Transcript of Record — DeForest Radio Co. v. General Elec. Co.

Supreme Court brief1931

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vol 1 te

_ TRANSCRIP OF RECORD. 1

—

Supreme ( Couns of 50 United States

orca en an, .

955 ree ee . ; : : 1 : 9 *. i 55. Ne

DeFOREST RADIO COMPANY, PETITIONER,

1 Vs. Wes N iu

GENERAL ELECTRIC COMPANY —

ON WRIT OF CERTIORARI TO THE UNITED STATES crRcurr | 2

1 COURT e APPEALS WOR SEN EMER EEN Ore, ‘

5 ee e ee ue

ae Es S2) ee

‘INDEX.

aN 1 ptEapinas AND*TESTIMONY. e

4 Docket Entries in ue $89... i ee

Docket Entries in No. 58 e ‘Tuite has Oy

Dim of Complaint in No. 589 .. SR e FFV *

® Answer as Amended in No. 8 e 1 0

eiendant's Bill of WWoicularr O ·· . ECM /

_ Defendant's Supplemental Bill of Particulars ....... r weaver I 2. :

im of Complaint in No. 59 . e 1.

5 Answer as Amended in No. 598 m.. 2 „eee wena I. D 8

o ˙7˙òÜĩ qĩ§ ae e le hae 5

r ET 1 138.

i _ Plaintiff's Prima Facie Proofs ............ ö ꝶ³＋3＋0*ã-„„33* I 335

Defendantes Proofs ...... 3 eee 1. 08

Deſendant's De positions „„ A. dee Il 959

"Plaintiff's Rebuttal Pro eee i

Deſendant a Sur-Rebuttal Proo ts cata ‘III. 1789. *

| Plaintiff's Sur-Rebuttal Prob H „ e e III 1910

Anpendix to Plaintiff's Re cori e e III 1940 sa

“Opinion of the Court . r III 10.3 ‘

Gabberee in No: od e III 18111

Plaintiff's Petition for Appeal in No. 589 ùũ0 e . III 19822

Order Allowing Appell SS skate vows cehaneg III i983

intiff’s Assignments’ of Error in No. 8mũ- III 1984

tion on Plaintiff's Appeal in No. 589 ...... e ( ee III 1985

tion as to Transerjpt in No. 588d III 1987

Order Approving Stipulation e 12 e ar . TH 1988

Decree’ in No. 8993 75 45265 „ TIL 196

Plaintiff's Petition tor Appeal in No. 598 gine oaks 8ue tenes Anka „

* eee, „„ . eee

Maintiff’s Assignments-of Error in No. 5 . . III 1993

ion on Plaintiff's Appeal in No. 598 ........ Wee Perr

Yefendant’s Petition for Appeal in No, $98 . at «seeker e

Order Allowing Appell. ©, spas Spee bi dy cates NN ie

ndant’s n No. 598 (on ec ee

tion on Defendant's Appeal in No. 598 ꝶ 99 III 6999

tion as to Transcript in No. 5 pada sek wives TIT 200

Order Approving Stipulation ........./........0005 „ III 2001 J

's Certißeatte e III. 2002 4

4 0 *

_, __ INDEX—Continued. res ee

PLAINTIFE'S PRIMA 1 FACIE PROOFS. - ee ae

e John V. 8 e 3 res Vol. Page 4

Direct Examination ....’....... 55 1 39:

Cross- Examination ene C ˙· béaws 11 94

Re- Direct Examination E 5 5 7 4 f 1 126

Re- Cross- Examination „ „l e 1 135

nen e.. N —2—9—5VTk̃ N “at I 144

—

eee "DEFENDANTS PROOFS. 7 a

Direct Examination . 8 Be 1.665

„Cross- Examination r * 1 628

Re Direct Examination Ne esos . * Il 746

_ Re-Cross-Examination ....... 9 o 11 765

on Re-Direct Examination eee Need eee ** 7

Re- Cross- Examination . r Il 785

b.. Ralph R— 75 ; ms n

Direct Examington . ... . . . b etüe, II 1016

. l II 102

deen Lacken eee. 4 ae A ae

_ Cross-Examination . FF 1

eee es fa aaa me

4 Direct Efamination 8 II 802

15 + Direct Eramination ...... . . . . . . II 1005

* ee eee ee eee II

i eee, II

‘

“Hyde, Ralph -- piel Voi. Page

Direct Examination bee eee 9.324

Cross- Examination 79＋59ꝙ＋22 eee e ee 998

Re- Direct Examinagion ..... 5 ede e e ee

Re- Cross- Examination . de: „ „ „ II 1004

Jewett, Frank B— — 55 ; ; ee. * a

Direct Examination l i th 80

cross-Examiua tion VVV dee,

aT MIMO: ᷑ ̃m . c ovicecdesobvewe chet: 1. 436

Re-Cross-Examinatiorn e 14

Kelly; Marvin 9 -; ee Ss

Direct-Examination ........ 5 8 . „„ 2H

Cross- Examination. 5, . S renne II. 857

Re-Direct Examinatile ee e e RES

Lamc it, G. E. . 15 ’ 1 .

„Direct Examination e * e II 1025

Direct Examination (Resumed) ...........°: Rand II 1065

Cross- Examination . Wenn 3 2 . II 1067

Re- Direct Examination eee eal tut ane

"Mittixan, Rober! A.— „„ W

Direct Examihatiooꝶnmn e in 1 440

Crose- Examination e I 450

Re- Direct Examination’ ............ N seaviabedn e G le

Direct Examination N II 61057

Sarnoff, David (Stipulated Testimony) . e „ III 1446

Lek Austin Y—. . Derren vs WN tek) i

Direct Examination MMA FFC

; Woterman, Frank N. (Stipulated rea . e . TIT 1486

Watkins, James O— oy

Direct Examination 4 Mb ovine’ ele K % II 1083

Cross- Examination 8 3* “é »“m» 2 . II 1055

Re- Direct Examination W eee; II 1055

PLAINTIFF'S REBUTTAL PROOFS

Alexanderson, Ernst F. W.— 1 . | oe

Py 0 Examination „%%% Laney co mag III 1

Cross-Examination ise Sh e eee eee III 1

Deer Examination ....4.,.00 . be in

%% ͤ „ b c 111 1832

* „ ( 0 f

7 5

” od b 1

Oe N

n a be mag

‘Hogan, John V. I. - f Vol. Page

Direct Examinadtocn eee II 1583

Cross-Examinatickrtn e eee eee 111 1639

Direct Examination (Resumed ) n III 165,

Direct Examination (Resumed) ....:........ enn

Cross-Examination Wen — 5 4 4 1 „ „-U

Lene ee : eee:

NE NE mme li 1079

" Cross-Examination © ..........\se00es e avers 1 „ IE 1299

- Re-Direct Examination 2 N 111 166

Re-Cross-Exatni nation e 8 111 1

White, William C.— ;

Direct Examination ............ R III 1467

S b e ee 6 a II 1490,

: DEFENDANT'S SUR-REBUTTAL PROOFS,

Arnold, Harold D. (Recalied)— —

‘Direct Examination SENN EM rep TRON Ro 4a III i

Cross-Examination, ..... 855 Tee en III 1878

Becker, Joseph A.— ‘

wee hne 1 1789

Cross-Examiination, zz PT ere III 1824

Re-Direct Examination n III. 1847

Re- Cross-Examinatioctrn „e des eee III. 1847

Folk, George E.— . 8

Direct. Examinatioor nn 5 % %j, 6444144 .. III 1882

Cross- Examina tion ee en nne ere III 162

Re-Direct ists saat III 1807

Hunter, Frederick L.— P

Direct Examination „Nee eee. en III 1993

r bbb e ne III. 1006

Re-Direct Examination ———— —2—[ ( . . III 190

RNe-Crose Examination lan „ III 197

Direct . ee N . III 166

ba ca ‘PLAINTIF’S SUR-REBUTTAL PROOFS. *

Direct Examination ........ NPE e III 1910

r e ebe ede u III 10

Langmuir, Irving 8 40 N Be

Direct Examination ...........- „% T

1 1

i : 1

“Opinion of Court of Appeals, District of Ch.

bia, in Langmuir v. ‘Amold, dated June 1, 1928. II 935

4 _PLAINTIFF’S EXHIBITS.

e | GENERAL INDEX. |

Ex 3 Admitted Printed,

No. Vol. Page Vol. Page

1. Langmuir U. — 1588436, Oct. 20; 1905. I a

2. Langmuir U. S. Patent No. 1,244,216, Oct. 23, 1017. Is 36 V 11

3. Langmuir U. S. Patent No. 1,244,217, Oct. 23, 1917. 1 36 IV 16

4. Langmuir U. S. Patent No. 17829, 597, Mar. 10, 1928. 1 36 IV 20

5. DeForest Type H Rectifier Tube Pigs cg N 1 51 — —

6. DeForest Type H Audion Tube .................. 1. - =

7. DeForest DV s Vacuum Tube . e 131 — =

8. Le Forest DVS Vacuum Tube sae ah 1 81 — —

SA. Data sheet accompanying DeForest DV 5 Vacuum 7

\ P 8 „ 7 hn, ae aa

9. De ſendants Circular . ee ties: Wa teonesine Si IV 28

10. Defendant’s Leaſet Stina: BARRA eee I.. 1 a ee

u. Hogan Fig. 1; Diagram bi Two Electrode Tube. ern

12. Hogan Fig. 2, Diagramsof Three electrode tube. 1 52 IV. 32

13, Hogan Table I showing Power of Numbers 5 r ht ewe

4. Chart A of Table I, Simple Powers of Men 3 N

bers, Arithmptie Pahe r I 0 l 34

15. Hogan Chart B of Table 1, Simple Powers of Non. 1 — 5 5

bers, Logarithmic Paper 1 70 IV 35

16. Plaintiff's UV 199 Tube ** 192 —

16-A. Data sheet @nclosed with UV 199 tube. I 92 ly 36

. Plaintiff's UX 201A Tube. . ae al.

17-A, Data sheet enclosed with UX 201A Tube I 93-IV 37

18 Hoga} Drawing illustrating Plff.’s UX 201A tube... 1 94: IV 38

13. Hogan Drawing illustrating Defendant's DV 5 tube. I 94 IV 39

[Nos. 20 to 161, incl. Langmuir Exhibits in Interfert ;, or

_ ence Record and not reprinted. Ser Separate In- ö NN

PLAINTIFE'S EXHIBITS—GENERAL INDEX.—Continued,

VV ee „ Admitted Printed

ER a a 1 Vol. 98985 Vol. Page

i de, Yama pot of vile late and eri ait e. „„

aise rent audion No. ..0....0...ccesseeees . ap 1198 IV 2

167. Langmuir explanatory’ en j —b

9168. Langmuir explanatory diagram K revere eds . Ak Ma

168-K. Langmuir explanatory diagram Al ............... II 1267 IV 51

1 68-B. Langmuir explanatory diagram . II 1267 IV 52

5 168-C. Langmuir explanatory diagram Bi R FFF 53

' 168-D. Langmuir explanatory diagram D „„ Ae daa Ie. Ge

638-E. Langmuir explanatory. diagram E II 1267 IV 55

168-F. Langmuir explanatory diagram F . II 1267 IV 56

169. Letter from Alexanderson to Patent Department * ö g

General Electric Co., February . III 1452 IV 37

170. Eile wrapper and contents Arnold U. 8. — No. a 3

13'297, 309, March 18, 1999 ee, ee

171. White notebook No. 462 (certain pages only) III 1468 IV 279i

122. Wnite test records (Card & 7 sheets) III 14% IV 108

; 173. 2 White report on relaying of high frequency currents anions

by means of improved audions ................... III 1483 IV 115

17, TCooclidge notebook No. 3277 6 . III 1506 IV 121

n Coolidge notebook No. 446, extract from III 1518 IV 128

176. Hogan diagram of vapor pressures of sodium. III 1612 IV 19

17. DeForest Bulletin B-14 of 1914 N III 1682 IV 10

118. DeForest Bulletin B-18 of he „ III 1632 IV. 134

179. DeForest Bulletin C-16 of 1910. III 1633 IV 149

180. DeForest Catalogue nn PRET III 1633 IV 153

181. DeForest Catalogue B of 191999... . III 1633 IV 186

182. DeForest type T. audion Tube III 1633

183. Circular of Sterling Reactivato r III 1638 Ju 161

184. Hewlett sketch of circutt . 3 II 1639 IV 166

188. Letter and data sheets furnished by witness Kelly. III 1738 IV 10

186. Hogan Logarithmic plot of Audion 64.91. I 1744 IVt 17s

187. Hogan Logarithmic plot of Kelly data for tube 102 D AGI 1745 IV 176 o

* 188. Hogan Logarithmic aict of characteristic small re- 3

unt ceiving, tube-corrected for contact differential. III 1748 IV 177

1 155 Hogan plot (Anod! Current)’ 2½-Anede Vene

, Characteristics of Tre 0. beer Tube .. . III 17% IV 178

; (vi)

* oe

8 0 my

fees: = my ale 8 55

a (ice bee 5

SE Pee CRS 8

2 5

rlamerirrs EXHIBITS—GENERAL INDEX Continued, 5

No.

190;

191.

192.

193.

194.

195.

196.

197.

198, »

199.

200.

201.

189 -A. Hogan plot of “Anode Curgent—anode Hiace Char-

7 acteristics ‘of Type 1 Power Tube

Hogan logarithmic plot of plate currentplte voltage

28 UX-201A Tube (H- 20)

Logarithmic plot of Kelly’s data on 1 Tube 105.

‚GB— H 22222

lines thereon.

Hogan Logarithmic plot N Type 7510 with nitrogen. .

‘Physical Review, Vol. 26, No. 4, October, 1925,

pp. 436-435, “Probability of. Ionization of Cas

Molecules by Electron Impacts,” by e and

Van Voorhis

‚— R * *

‚—ͤ— U Uni **

. Paper No. 4, Arnold v. Langmuir Interference 40,380

Paper No. 6, Arnold v. Langmuir Inter ference 40,380

Paper No. 9, Arnold v. Langmuir N 40,380

Paper No. 10, Arnold v. Langmuir Interference 40,380 g

Paper No. 32, Arnold v. Langmuir Interference 40,380

Paper No. 85, Arnold v. Langmuir Interference 40,380

Option Agreement, Dec. 16, 1912, between Hewett

and A. T. & T. Co.

‚J—U—— nũ B ũßũ. 6666666650

201-K. Agreement A, between Hewett and A. T. & T. Co.

202.

203.

204.

205.

206.

210.

Hewett U. S. Patent No. 781 ,001, Jany. 31, 1908...

Hewett U. S: Patent No. 781,002, Jany. 31, 1905...

* Hewett U. S. Patent No. 749,791, Jany. 19; 1904.

Hewett’ U. S. Patent No. 749,792, Jany. 19, 1904.

Hewett U. S. Patent No. 749,793, Jany. 19, 1904.,

Hewett:U. S. Patent No. 758,650, May: 3, 100.

Hewett U. S. Patent No. 954,434, Apr. 12, 1910

Hewett U. S. Patent No. 991,304, May 2, 1911

Table of Mechanical Repeater Installatioas, 1904-

1918, in Gherardi depition © . .

— —

210-A. Table of Repeater Installations, ae Gherardi

211.

— 8

deposition

Philosophical Magazine (1912), Vol. 23 pp. 192.300,

Loniatios Produced by Carbon at High Tempera-

‚J— UU UU mœPœPœ P HHV Ww ˖˖[ĩ＋p 1um2*ãm 2 2 36666

tures,” by Pring & Parker 3 8 5

12 * ene U. Se Patent No. 954, 619, April 12. 1910.

55 ; 72 ee ae

III

— ee

III

III 1749 IV 5

III 1750 IV.

„ H 1782 ‘IV

Hogan copy of Deft’s Exhibit 54-A\ ‘with additional”

III 1755 IV.

TL, 1758 Iv |

¥ eo. ra *

Ill 1761 IV

III 1762 IV

III 1762 “IV

III 1762. IV

III 1762. IV.

IIE 1762 IV

III 1763 IV

‘IIL 1763 Iv

111 1765 IV

1763 IV

111

III

1763_.1V

1763 IV

111

III.

1765 IV

ORD

1766 1

1763 IV

1763 1

1763 IV"

1763 IV

” Admitted Printed

Vol. Page Vol. er

PLAINTIF®’S EXHIBITS—GENERAL INDEX—Continued |

“

Ex. . 5 3 . Admitted. Printdi-

A = ; Vol. Page Vol. Page

213. De Forest U. 8 Patent No. 879,832, Feby. 18, 1908 III 1766 IV 273

214. Modification of license agreement dated July 1, 1920 a 5

between General Electric Co. and A. T. & T. Co... III 1786 IV 27

TLangmuir N. S. Patent No, 1,558,437, Oct. 20, 1925. III 1820 IV 313

5 Nicolson. notebook (Not printed in full ) II 901

216-A. Certain pages · of Nicolson notebook: .............. II 501 IV 22

217. ‘DeForest U. S. Patent No, 1,201,273, Oct. 17, 1916.. III 1887 IV 328

218. Certain pages of book of O. W. Richardson entitled 0 7

“The Emission of Electricity fra Hot Bodies“. III 1891 IV 332

219A. Langmuir replot of data taken from Defendant's Bs fi

oo Bible Me: s . e un TV. "$86

219-B. Langmuir Parabolic Plots of currents taken from

. Defendant’s Exhibit No. 299 99 . III 1930 IV 359

219-C. Langmuir Parabolic plot of currents taken from 1.

Defendant's Exhibit No. W . III 1930 IV 360

220. Langmuir Logarithmic current voltage curve for dif- :

“ ferent pressures of nitrogen e . III 1831 IV 361.

° N 0 a

: ee

176.

189-A..

193.

PLAINTIFF'S EXHIBITS.

* CLASSIFIED INDEX.

Diagram an Drawings.

Hewlett sketch bi: cut . „

Hogan Fig. 1, Diagram of Two electrode Tube

Hogan Fig. 2, Diagram of Three electrode Tube

Hogan Table I showing Power of Numbers.

Hogan Chart A of Table I, Simple Powers ¢ of Num-

bers, Arithmetic Pwper .......... 8 i

Hogan Chart B of Table I, Simple Powers of Num-

bers, Logarithmic 1 T

Hogan Drawing illustrating Piff.’s UX 201A tube..

Hogan Drawing illustrating Defendant’s DV 5 tube..

Hogan diagram of vapor pressures of sodium

Hogan Logarithmic plot of Audion 64-9 11.

Hogan Logaritiimic plot of Kelly data for tube 102-D

Hogan Logarithmic -plot of characteristics of small

receiving tube corrected for contact differential.

Hogan plot (Anode Current) .2/3—Anode Voltage’

Characteristics of Type G Power Tube

Admitted

Printed

Vol. Page Vol. Page

III

Ill

III

All

III

Hogan plot of Anode current—anode voltage Charac- .

teristics of Type G Power Tube ....... .

Hogan logarithmic plot of plate current—plate -volt-

gage of UX. 201A Tube (H- 2) N

Hogan copy of Deft.’s Exhibit 5A. with additional

) d Gn kapecen Aaben ee

Hogan Logarithmic plot of Type 7510 with’ nitrogen.

„ Logarithmié plot of Kelly’s data on Tube 10s

5 ‘Langmuir explanatory diagram fer ere re re

. LangYhuir 2/3 power plot diagram eee e

. Langmuir 3/2 power plot diagram „„

Langsauir plot of volts on plate and grid: agains

rent audion No. 3 cert baka ks

! Angmuir explanatory diagram V

ö 6

HII

III

1639

IV 165...

IV 31

IV 32

IV |

6 IV „„

1748

1749

Stes J

1750

1755

1758

1752

1126

1195

1198

1260

V 35

iv 386

‘IV ‘9

IV. 129

W 128

IV 16

8 | ;

y n

w 178

IV 7

IV 180

IV. 182

IV 163

IV 181

IV 45

IV 4

IV 47

IV 48

W 49

| 2

_ PLAINTIFF’s EXHIBITS—CLASSIFIED INDEX—Continued.

et. 0 ; n Admitted Printed

8 . > Vol. Page Vol. Page

168. Langmuir explanatory diagtam Beh ec vies „ 1 F 1267 IV 80

168-A. Langmuir explanatory diagram A! ..... Sb 4 AO: I. 1267 IV S1

168-B. Langmuir explanatory diagram , H AV. 8

. eee explanatory B ³·*wmꝗwmĩ „ 19 1267 IV *

168-D. Langmuir explanatory diagram )))) I 1267 IV

168-E. Langmuir explanatory Diagtgm E Ser ee II 1267 IV 55

168-F. Langmuir explanatory diagram FFF: II 1267 IV 36

219 A. Langmuir replot of data taken from Defendant’s Ex- .

.. i ie BOB Si ccc V III 1930 IV. 358

21948. Langmuir Parabolic Plots of currents taken from De- ap 7

fendant’s Exhibit No. 299 III 1930 IV 359

219.-C. Langmuir Parabolic plot of currents taken fron De- * i

fſendant's Exhibit No. 29?7ù̃ sees ‘III 1930 IV 360

5 220. Langmuir Logarithmic current voltage one te «. GG:

| different pressures Of nitrogen „ III 1931 IV 361

i : ° Documentary, Miscellaneous. :

201-A. Agreement A, between Hewett and A. T. & T. Co. III 1763 IV 214

183. Circular of Sterling Reactivato r III 1638 IV 161

8. A. Data sheet accompanying DeForest DV 5 Vacuum tube I 93 IV 27

16-A. Data sheet enclosed with UV 199 tube ee ee ie

17-A. Data sheet ‘enclosed, with UX. 201A - ere = ae

—-9.— Defendant's: Circular . Se RW SS

10. Defendant's Leaflet ....... „ e 1 2 5 51 IV. 29

177. DeForest Bulletin B-14 of 1914 r III 1632 IV 130

“178. DeForest Bulletin: B-15 of -1915 ............ N III 1632 IV, 134

179. DeForest Bulletin C-16 of 1910 3 . III 1633 IV 19

180. DeForest Catalogue L.....:....... 5 19 % IEE 1633 TV 163

181. “DeForest Catalogue B of 1919 II 1633 IV 156

169. Letter from Alexanderson to Patent Department, Gen- „

eeral Electric Co., February 5, 1912 III 1452 IV 7

188. Letter and data sheets furnished by Witness Kelly. . III 1738 IV 1670

214. Modification of license agreement dated July 1, 1920 ee *

between General Electric Co. and A. T. & T. Co.. III 1786 IV 277

162. Opinion f Court of Appeals, District. of Columbia, ae

| in Langmuir v. Arnold, dated June 1, 1925. u 35 W A

. . „%%

PLAINTIFF'S EXHIBITS—CLASSIFIED INI X—Continued. A

“Option ~Agreement, Dec. 16, 1912, between Hewett’

and A. T. & T. „ A

195. Paper No. 4, Arnold v. Langmuir 1 40,380

196: Paper No. 6, Arnold v. Langmuir Interference 40,380

2 197. Paper No. 9, Arnold v. Langmuir’ Interference 40,380

ca 198. Paper No. 10, Arnold v. Langmuir Interference 40,380

199. Paper No. 32, Arnold v. Langmuir Interference 40,380

200. Paper No. 85, Arnold v. Langmuir Interference 40,380

210. Table of Mechanical Repéater Installations, 1904-

1918, in Gherardi deposition

210-A. Table of Repeater Installations, 1904-1918, Gherardi

depose /ͤ A eee

172. White test records (Card & 7 sheets

173," White report on relaying of high frequency cur-

i rents by means of improved audio nge

File Wrapper and e

170. File wrapper and contents Arnold U. S. Patent No.

1,297,309, March 18, 1919... .:: *

— (ü — ;

174. Coolidge Notebook MO, / w (

175. Coolidge Notebook No. 446, Extract 9 5 35 992

216. Nicolson ‘notebook (Not printed in full) i

„ 216-A.Certain pages of Nicolson notebook d. orca

171. White Notebook No. 462 (Certain pages only) >.5.::

Patents, United Susie:

213. - DeForest, No. 879,532, Feby. 18, 190. ES

217. DeForest, No. 1,201,273, Oct. 17, 1916.

212, Fleming, No. 954,619, April 12, 1910. fo

22. Hewett. No. 781,001, Jany. ee ap

203. Hewett, No. 781,002, Jany. 31, 1505. .

204. Hewett, No. 749,791, Jany. 19, wos aye 9

_ 205. Hewett, No. 749,792, Jany. 19, . 1

Admitted Printed

8 a Vol. Page Vol. Page

III 1763 Iv

III 1762 IV

III 1762 1

411 1762 IV

III 1762 ‘IV

III 1762 IV

III 1763 IV.

III 1765 1

III 1766 IV.

III 14 IV

— II 788 1

III 1506 IV

III 1518 IV

II 801 Not printed

II 801 IV 322

III 1468 -IV

III 1766 IV

III 1887 1

III 1766 1

III 1763 IV

III 1763. IV

III 1763 JV

1II 76 “IV

121

128

—

PLAINTIFF'S EXHIBITS CLASSIFIED INDEX—Continued.

Ex. . - Admitt@d "Printed

No. . Vol. Page Vol. Page

206. Hewett, No. 749,793, Jany. 19, 190. III 1763 IV 247

207. © Hewett, No. 758,650, May 3, 1904............... III 1763 IV 250

208. Hewett, No. 954,434, Apr. 12, 1910. III 1763 IV 252

209. Hewett, No. 991,304, May 2, 1911. III 1763 IV 255

1. Langmuir, No, 1,558,436, Oct. 20, 192. „ien N 1

2, , Langmuir, No, 1,244,216, Oct. 23, 1917. T ] N

3. Langmuir, No. 1,244,217, Oct. 23, 191772. 1 36 IV. 16

4. Langmuir, No. 1,529,597, Mar. 10, 1925. I 36 IV 20

215. Langmuir, No. 1,558,437, Oct. 20, 1928. III 1820 IV 313

—

1 (1912), Vol. 23, pp. 192-200,

“Ionization. Produced by Carbon at High Temper-

atures,” by Pring & Parker III 1766 IV 263

194, Physical Review, Vol. 26, No. 4, October, 1935, pp.

436-435, “Probability of . Ionization of Gas Mole-

cules by Electron . 5 by Compton and Van :

RR ea SSC SIE ree St ope HI 1761 IV 185

218. _ Certain pages of book of: O. W. Richardson, on es

j “The Emission of Electricity from Hot Bodies“. III 1891 IV 332

Physical Exhibits.

% » A ee

6. . DeForest Type H Audion Tue Gee a a ae

7. DeForest DV 5 Vacuum Tube .................. 1 81 — —

8. DeForest DV 5 Vacuum Tube th

182. DeForest type T audion Tube 47 „ III 463 =

16. Plaintiff's UV 199 Tutte eote, Et GR —

2 Plaintiff's UX 201A Tube TT.. vie sch oR AE ee

1 >

Ba a (xii). e

f * 0 ; .

9 1

INDEX TO PLAINTIFFS EXHIBITS. -

in |

_ INTERFERENCE RECORD.* ;

Inter. Trial. ; A Inter

Ex. Ex. 5 Record

No. No. a d Page

1. 20. Diagram, Figl Nell S ee 1018

2. 21. Physical Review Paper of W 191. Not pr inteſ

3. 22. Diagram, Fig. 8 ee dc e e ee 4042

4. 23. Diagram, Fig. 3 n Reer 1 %% Mem

5. 24. Diagram, Fig. 4 rere sn denen 1052

6 285. American Electro-Chemical Society Paper of 1016 40. Not printed 8

7. 26. American Chemical Society Paper of November; 1916. . . Not printed

8 27. Diagram, Fig. FC 1090.

9. 28. Diagram, Fig. 6 32322 65 ee ee eee -» 1094

10. 29. , Diagrall Fig. 7 ...... arb ee ee eee

11. 30. Diagram, Fig. S8 l „FFF 1097

n M. Dine Big. 9 ecreds vel yviewtbe ce FCC

13 32. Logarithmic Plot of Volt-Ampere Characteristics of Regulator eae

Kenotron with High Vacuuunnn „

14 33. Volt-Ampere Characteristies 90 Regulator Kenotron with

Ver High Vacuum 1% eid ceuses 2. He

15. 34. Logarithmic Plot of Volt-Ampere Characteristics of Regulatér /

_ Kenotron: with Filament Current at 1.25 Amperes and with.

High Vacuum e 1120

16 35. Volt - Ampere Characteœistics 1 Regulator Kenotron with Fila- pares

i ment Current at 1.25 Ampe és and with High Vacuum 9 1121

17. 36. Logarithmic Plot of Volt- Ampere Characteristics of Regu-:

ntor Kenptron with Mercury Vapor Present woos 1128

18. 37 Volt- Ampere Characteristics of Regulator Kenotron with'Mer- _- f

oP cury Vapor Present e e bees e

19. 38. Diagram of Circuit Connections e 3

20. 39. Regulator Kenotron with Appendix and Charcoal Tube (Pho- ; 25

2 tis

: tograph printed % 1109

21. 40. Nickel Anode Tube (Photograph printed) —— 2 aes 1130

21-A. 41. Curve eri eg of Nickel Anode Tube 22 Serre S522 2 1141.

*Referred to in Interference record as “Langmuir Exhibite*§——

(xiii)

Pe Viti

. INDEX TO PLAINTIFF'S EXHIBITS IN INTERFERENCE RECORD uid

Inter. Trial Inter

1 | W nae Record

No. No. ‘ Puaze

22. 42. Standard Coolidte Sion ‘Tube (Photograph printed) ....... 1151 —

23. 43 Volt-Ampere Characteristics of Standard Coolidge X-ray Tube 1157

24 44 Logarithmic Plot of Volt-Ampere Characteristics of Standard

Coolidge X-ray Tube ee V 11586

28. 45. Standard Coolidge X-ray Tube with Cathode Shield Removed 5

: (Photograph printed) ...... N n „ 2EMRa

26: 46. Volt-Ampere Characteristics of Standard Coolidge X-ray Tube: 0

with Cathode Shield Remove. a

27 47. Logarithmic Plot of Vojt-Ampere Characteristics of Standard

7 Coolidge X-ray Tube with Cathode Shield Removed ...... 1160

28. 48. Radiator Type Coolidge X-ray Tube (Photograph printed). 1151

29 49. Volt-Ampere Characteristics of Coolidge ae Tube, Radi-

ator Type . ˙—˙ Viweiones s . . 1163

30. 50. Logarithmic Plot of Volt-Ampere Characteristics of Coolidge

os X-ray Tube, Radiator Type dee 8 1164

31 51. Type P Pliotron (Photograph printed) C 8 118

8 Volt-Ampcre Characteristics of T ype P Pliotro˖n . 167

. Logarithmic riq: of Volt-Ampere Characteristies of 1 8

Pliotron oe JJJ/%% AAO ̃ HaT ee de® oa « 1168

34 54. Volt-Ampere Characteristics of Type P Pliotron, ‘taken with

Rotating Commutator :..,.... 4 1169

35. 55. . Logarithmic Plot of Volt- Ampere Characteristics ofsType P

: Pliotron, taken with Rotating Commutator JJC wes ex ee

36. 56. Rotating Commutator 3 F e

. 57. Diagram of Circuit Confebtions . 1172

38. 38. Type U Pliotron (Photograph printed) . = per e 1152

. 589. Volt-Ampere Characteristics of Type JJ Pliotrag u 17

40. 60. Logarithmic. Plot of * t Ampere Characteristics of Type oo See

: Pliotron FCC erin’ — 2 „%„%„4 444 ͥ 1176

41, 61. Type T Pliotron (Photograph printed) ie eee 11¶53

42. 62. Vo t-Ampere Characteristics of Type T Pliotron ........ wees HDS

43. 63. Logarithmic Plot: of eee eee of. Type T 4

Pei OO Woe as atte hen tm eadle ⁵ hate tleTt ok man ve bS Sos 1

44. 64 ‘Type G Pliotron vr. 11 ‘(Photograph printed) „

45. 65. Type G VI. is mme printed n eee, MRES

6 5

Qe Oe *

‘INDEX TO PLAINTIFF'S EXHIBITS IN INTERFERENCE RECORD

Inter. Trial Inter.

No. & e 7 Page

60. Volt Ampere Characteristics mn { Type G Pliotron VI. 11 „ 1183

67. Logarithmic Plot of 1 8 ge men of Typ G ;

W evaeti aaa ae: Ss

68. Volt-Ampere Characteristics of: Type G Pliotron VT. I3, with

5 Grid connected to Negative End of Fllament 1185

. 69. Logarithmic Plot of Volt-Ampere Characteristics of Type G ;

Pliotron VT-13, with Grid connected to Negative End of

rb Re Conese tee ace wens “1186

70. Volt-Ampere — of Type G Pliotron VT-13, Grid

eee ere, dence a ia » 1187

71. Logarithmic Plot -f Volt-Ampere Characteristics of Type G

Pliotron VT-13, Grid connected to Anodle 1188

$2, 72. Kenotron Regulator Tube, Type TBA. (Photograph printed) 1184

53. 73. Volt-Ampere Characteristics of Kenotron Regulator Tube, :

%%% :.:. PLAGE bho 1191

. 74. Logarithmic Plot of Volt Ampere Chart 8 S I.

* 75. Kenotron, with Filamentary Anode (Photograph printed). 1154

56.: 76. Volt-Ampere Characteristics of Kenotron with Filamentary aie pete

aN Anode at Different Filament Temperatures ........ Coveuds SOO |

57. 77. Temperature Current Characteristics of ‘Reaotron with Fila-

aaa mentary JJV gis oe her eo 1194

58. 78. Logarithmic Plot of Volt-Ampere Characteristics a Keno-

tron with Filamentary Anode „ N 1198

* bb e

60 80. Diagram, Fig. 111 o N 1204

61. 81. Diagram, Fig. 1222 e e N

6. 82. Diagram, Fig. 122 e e — . 1209

63. -83. Diagram, Fig. VVV N r ? 1211

6. 84. Diagram, Fig. 15 ...:...... . e

66. 85. Thomson Lecture Reported. i in “Bnginesring” . aoe . Not printed :

66. 86. Logarithmic Plot of Richardson Data . 1268

67, 87. Volt-Ampere Characteristics of Fleming Vacuum Valve . . 1319

68. 88. Logarithmic Plot of esi ss Characteristics of Fleming

ie Vacuum Va—e n . . „ 1500-

59.

en. rs — c

.. | INDEX ro PLAINTIFF'S EXHIBITS IN INTERFERENCE RECORD

Inter. THis} e 0 ae

E, Ex. 55 . | Recos

No. 5 No. v * Page

„ 70... 90. Plot of Van der Bijl’s Data-on page 47 of Arnold's Record. 153)

71. 91. Logarithmic Pt of Van der Bur. Don of page 47 of- Ar-

ö rr iss2

72. 92. Plot of Van der Bijl’s data on pages 49, 50 of Arnold's Record 15%

, 73. 93. Logarithmic Plot 6f Van der Bijl’s Data of pages 49, 50 of

renn eee eee 1597

74. 94. Plot of Van der Bijl’s Data on page 51 of Arnold’s Record .. 159

75. 95. Plot of Van der Bijl’s Data on page 67 of Arnold's Record. 184

76. 9806. Logarithmic Plot of Van der ihre Data on page 67 of * .

nold’s Record li neee . 145

77. ' 97. Piod of Van der Bijrs Data on page 211 of Arnold’s Record. g

78. 88 Logarithmic Plot of Van der Biirs Data on. page 211 of Ar-

0 ͤ K K 158

79. 99. Sweetser- Record Sheets S-1146 to S-1214, Experienéat No.

aH 3 c „ ot ss

. 80. 100. Sweetser Record Sheets S-1345 to S-1432-13; ee 9

b , spuspsaeccnseketes os caus 3 Not printed

81. 101. Janek Notebook No. 413, pages 1-14. . Not printed

102, Volt-Ampere Characteristics of Pliotron No: 79 AEs 3

83. 103. Logarithmic Plot of Volt-Ampere Characteristics of Pliotron -

ie Ree Ba Miki VVV teens 1593

84. 104. dient of 1 Institute of Radio Engineers, N

5 TW jJJJſ%d%d%%%% ͤ ͤ „„ Not printed

„ 105. Tungsten Wire Audion No. 2 5 printed) ........ 1619

386. 106. General Electric Review Article on Coolidge Xray Tubes. . Not printed

87 107. Lt. Gutton’s Article in Revue Generale de Electricite . Not printed

488. 108. Calculations Involving Maxwell's Distribution Law Saas Not printed

89, 109. DeForest Audion Record Sheets n Not printed

90. 110. Logarithmic Plot of DeForcst Audion Data e . pele 1981.

A. III. Logarithmic Plot of Pietce’s Data 7 86

e ‘Logarithmic Plot of Pierce's Data . 2052

113. Plot of Pi Da. . % vy qq ͤ 20>

15 D. 114. Plot of Pierce’s Data 553544 „446 2060

ore = 115. Plot of Pierce's Data... 3 . 200

F. 116. Plot of Pierce’s Data on Audion 20... e . 2073

a is g (xvi)

—

—Continued. «

Inter. Trial Inter.

Ex, Ex. . 8 7 Record

No. No. a 0 2 iy Page

6. 117. Plot of Pierce's Data on Tubes A-3 and B33. . 2078

H. | 118 - Plot of Characteristics of Audion A-9.111 . .. .. 4 2085

I. 119. Plot q Sweetser’s Data of August, 1912 bb oabis hv emdelle ane

J. 120. Volume Gillette Photographs 125 Not printed

K. | 121, Gillette Neat 8 Nile bees oo.

L. 122. Photograph of Langmuir’s Laboratory e —r devas 2096

M. 123. Lamp Vacuum Committee Reports Not printed

M 124. Robinson Noteboszszzz q „Not printed ©

O. 125. Mackay Notebook .......-eecreeeeeeeees A. cde css Not printed

p. 126. Dushman Notebook No, 40 . . Not printed

Q. 127. Dushman Notebook nene Not printed

ce Mae Piot of Data of Lamp No. 2 of November 19. 191222. 2101

S. 129. Gartner Letter of February 6,191 ···:i eeee ees 9 . 2111

T. 130. Diagram deren ann ware 2112. ‘

u. 131, > Langmuir - Nobel Na: 62 4 vive l Not printed

v. 132. Langmuir Notebook No. W Nee eee a > hess ee

133. U. s. Patent No. 1,103,688, W. L. Richacle e 2³³³ Y

4. U. S. Patent (Ko. 1. 114.845, H. DeF, Arnold 026003 28485

135. U. S. Patent No. 1,128,279, H. DeF, o

135. U. S. Patent No. 1,128,280, H. Der. Arold. . 2375

137. U. 8 Patent No. 1,128,292, E. H. Colpittts 2836

138. U. S. Patent No. 1,129,942, H. DeF. Arnold „ 235

130. U s. Patent No. 1. 1293. H. Der. Arnoldi... . 2362

140. U. S. Patent No. 1,129,959, E. H. Colpitts. . e

141. U. S. Patent No. 1,130,008, A. MeL, Nicholson S ee SOS

142. U. S. Patent No. 1,130,009, A. Mel. Nicholson .. 2373

143. U. S. Patent No: 1,130,042, H. J. Van Der Bill, i 2366

144. U. S. Patent No. 1,130,043, H. J. Van Der Bijl, et al. ..... . . 2378

148. U. S. Patent No. 1,137,275, A. McL. Nicholson ..7......... 2371

146. U. S. Patent No. 1,137,315, R. A. Heising ©....<-+....+2+++ 2388

147. U. S. Patent No, 1,137,384, E. H. Colpitts . 2352

148. U. S. Patent No. 1,168,270; H. DeF. Arnold . 2391

tents

INDEX TO PL F’s EXHIBITS IN INTERFERENCE RECORD |

ibits Nos. 133 to 161, incl., ‘not given any Exhibit er a

8 8 5 oS 5 We 5 2. A :

INDEX TO PLAINTI ‘EXHIBITS IN INT ER

8 * : 8 < j —Continued. 5 : 5

nter. Trial 17 s e e, e e e e

. 5 5 a . .

149. U. S. Patent No. 1,169,182, A. McL. Nicholgo © 9 2397 ꝙ⸗à

150. U. S. Patent No. 1, 169,422, A. Mel. Nicholson 5 2

151. U. S. Patent No. 1,183,875, R. V. I. Hartley . 241g"

152. U. S. Patent No. 1,193,206; H. J. Van Der 0 ideas — 2⁰⁰⁰

8 153. U.S. Patent No. 1,194,820, E. H. Colpitis e 2410 ©

14. U. S. Patent No, 1,196,474, C. Mel. Nicholson: N , e

155. U. S. Patent NG. 1,196,805, 7. C. R. Palmer bebe e nde reng ee 239

156. ,U. S. Patent No. 1. 198.999, E. H. Colpitts s 26

157. U. S. Patent No.. , 198,700, E. H. Colpitts . N 2417

158. U. S. Patent No. 1,199,180, R. A: Heieing Aree, toe

159. U. S. Patent No. 1,200,796, H. DeF. Arnd 200

eee 160. U. S. Patent No. 1,237,210, Langmuir 3J—ͤꝰ aR

„ . Patent No. 1,251,388, ee N eo

8 2 + o*

tents Exhibits Nos. 133 to 10, incl., nor. res. any Exhibit ‘number i in

ae ee. x 0

= >? 9 5 5 0 5 :

. 8 i sce 75 5 re A 8 |

2 — He > * 155 5 1 0 ; . 0 * ö ;

0 a — e

7 » 0

„

0 * 9

’ é on F

- sway 5 — *

* 5

—

a "9 °

A 8 ;

~ 2 . 9 :

> <a

* — 7 * 5

* ; 5 *

* .

: :

0 i E

; 2 2 — . 3

2 80 6

wk 0 9 5 {

* 4

% 0 5 2

. ee C

4 . .

dee

: 7 (xviii): : 5 i

5 . i 4

* 8 * 5 vu

ass coed 3

2 5 . on

s J 0 * . — 2 7

60 * .

0 \ + a +s

„ ‘DEFENDANT'S EXHIBITS. .

8 ä e DEE. 5

1 Admitted Printed

NU. Vol. Page Vol. Page

1. Hogan Graph . selenite Glagadnt 2 plate cur- s

71 8 e ONES Bi Sh Sete oe te „

: S. Dot NET.) .. . . . er Pipe g „

a : Natare, July 15, 1875,. o. 217, Charcoal Vacua, N ati

dry. James DSW tee ce eee e 1h

3.0 Physikalische Zeitschrift, Vol. 29, pp. 46-50, 1909,

Tests of che Methods Used for Producing High ae

Vacua, by Scheel & Heuse ...... . 1 196 V8

4, Annalin der Physik, Vol. 12 (1881) pp. 425-445,“A ů: ::

New. Construction of tle Mercury Pump of Toepler

and Describing Some Experiments Made There: 5 5

with,“ by Bessel- Hagen 5 CS Tee hada oo I 19% V ;

5, Edison U. S. Patent No. 441019 Sept. 17, 1889. 1:16. 9 ¢!

6. . Malighan? U. S. Patent No. 537,693, April 16, 1895.. I 196 v aves

1. Dwyer U. S. Patent No. 596,654, Jan. 4, 1898..... 1197 V.

N. American Electrician, Vol. VIII, No. 1, May, 1896, a

Ceroolees Tubes and Experiments With Roentgen Ci

Rays,“ by Thomas Duncan I

Prcccecings of e Royal Society, A, Vol. 64, pp. .

231.238, “Liquid Hydrogen ‘for the. Production of ; P 8 d

High Vacua,” by James De War 33 R

10. Annalin der Physik, Vol. UI, (1900), pp. 389-37, „

Production of Cathode Rays by Ultra-Vioiet © :

„ n 5 oy Os Se dias sae 1 1% V 6

e. der Physik, Vol. VIII, (1002), pp. 1 8

“Photoelectric Action,” by P. Lenard ............ APR ON. —

u. ‘lectrical World: and Engineer, Vol. III, May 21.

1904, pp. 963-965, A Resume of Incandescent Elec:

dtiuie Lamps Exhausting,” by S. E. Doane. I 197 V 122

12. Recklinghausen U. S. Patent No. 946068, Jan. 11, 5 3

„„... igs eee dr BR VO

. Merritt U. S. Patent No. 909,811, Jan. Wie. 1 1% 386

; et : 2 . : 3 8 8 é ; 4 . 1

a te ((

te 7 :

te . zi - 8

2 . 5 3 :

- o. 5 2

* 2 * .

= . — 5 3 : Py 2

see ak $ * . * 2 - 8 .

8 — 2 a 5

5 . 4 7 8 7 :

8 8 —

DEFENDAMr's EXHIBITS—GENERAL INDEX—Continued.

—

2 — a en é ' Admitted Printed

No. a 5 x 5 N N Vol. Page Vol: Page

4. Proceedings of the Royal Society, Vol. 74 (1905), pp. oh

476-487, “Conversion of Electric Oscillations into

9 Continuous Currents by Means of a Vaeuum Valve,” 8 .

3 Warr ing * . e d e ve

“15. . Fleming U. $. Patent No. 803,684, Nov. 7, 1905.. I 197 v 157

16. ‘Scientific American Supplement, No. 1568, Jan. 20, aten

106, pp. 25129.25131, On the Electric Conduc-

tivity of a Vacuum,” by J. A. Fleming 1 197 V 16

17. Soddy U. S. Patent No. 889,02), July 2, 1907) I 198 161

18. Nature, Nov. 21, 1907, pp. 83-54, “The Wehnelt Kath- * TSS

ode in a High Vacuum,” by Frederick Soddy..... 1 198 V 19

18-A. Proceedings of the Royal Society (1907 ), Vol. “78-A,

pp. 429-458, “Calcium % as an Absorbent of Gases for

the 80 of High Vacua and 1 e eee

8 Nesearch,“ by Frederick Soddy / 1 198 V 19

ss | Physikalische eitschrift, Vol, 9 (1908), p. 193, Re- eer

ply to Soddy by Lilienfeld ...7.............0.04. 1 198 V. 22

. 20. Proceedings of the N dend Academy of Arts and

Sciences, Vol. XIV, No. 1, August, 1909, pp. 1-17,

“Friction in Gases at Low Pressures,” by 3. 1 Hogg J. 198 V 225

21. Annalin derMPhysik, Vol. 31, (1910), pp. 169-304.

“A Contribution to the Knowledge of the Inertia 5

ms of Moving Electrons,“ by E. Hupka oes egies 1 198

22. Physikalische Zeitschrift, Vol. 10, (1909), pp. 168- 70

176, Fae emzaaio Slow: Cathode Rays,”. by O. v.

Bacher Pein aGUNe cede ae bic ceed coe CEE nn 1 198

23. Thatcher U. 8. Patent No: 1,028,636, She .

24. Friedrich U. S. Patent No. 1,083,677, Jan. 6, 1914. 1 198

25. Annalin der Physik, Vol. 32 (1910), pp. 673- 738, es:

8 Conduction of Electricity in Extreme Vacuum,

: by J. E. Lilienfeld

25-A. Leipsiger Berichte, Vol. 63, (10% pp. 534-539,

“The ‘Conduction, of Electricity in Extreme Vac- :

Pee

241

2 S 0

4. sc ee

w& iy

n, by- J. E. Lilien fell I 198 388

26. Verhandlunger der Deutschen Physikalischen Gesell- 7

schaft, Vol. 13, (1911), pp. 601-606, On a Method „

ol Producing Very Soft Roentgen Rays in the e High- Ss :

sli pees by = Dember ee rt le 1 198 V 397

See h |

30-A. Atti Della Reale Accademia Dei Lincei, Vol. xXx

Annalin der Physik, Vol. 36 (1911); pp. 995-1026,

DEFENDANT'S EXHIBITS—GENERAL INDEX—Continued.

Admitted Printed

Vol. Page Vol. Page

Reflection and Secondary Radiation of Photoelec-

trically Liberated Cathode Rays, by A. Gehrts.

Marshall U. S. Patent No. 205,002, Nov. 14, 1916...

Physical Review, Vol. 32, (1911), pp. 492-511,

“Discharge from Hot CAO,” by C. D. Child.

Atti Della Raele Accademia Dei Lincei, Vol. XXI, —

(1912), pp. 235-239, On Electromagnetic Wave

Indicators Based on the principle of Electronic

Emissions from Incandescent M by Quirino

Majorana „„ c she MNS ONS Vida a as oe

(1912), pp. 274-277, “On a New Type of Indicator

of Electromagnetic Waves Based Upon Electronic

Emissions from Incandescent Wires,” by Quirino Sait

. — aes 3 FRR Be

Fortschritte uf dem Gebiete der Rontgen Strahlen,

Vol. 18 (1912), pp. 256-263, “An X- Ray Tube of an

Optional and Instantaneously Attainable Degree of

Hardness Independent of Vacuum,“ by J. E. Lilien-

tld . aS

. Physikalische Zeitschrift, Vol. XIII (1912), pp. 594- .

595, “About the Distribution of Light During the

Stratified Discharge in Vapors, of Alkali Metals,”

by Kunz . 7. f

American Institute of Electrical Engineers, Proceed

ings of, June 25, 1912, pp. 1207-1217, ee

by W. R. Whitney . c f

es Clark U. S. Patent No. 1121808, | Dec. 22, 1914.

Annalin der Physik, Vol. 41 (1913), pp. 1-26, Con-

cerning the Pressure of — Rays,” by Ernst

V. Angerer FFF

Clough U. S. Patent No. 246,054, Nov. 13, 1917.

. Mackay U. S. Patent No. 1,208,597, Dec. 12, 1916.

Coolidge U. S. Patent No. 1.082.933, Dec. 30, 1913.

Langmuir’ New Zealand Patent 8. . April 8,

Re WOES, ͤ—»àjZmů en vi cd «i e.

— — — —

199

2 2

| < mn << < 23

4⁰³

433

457

465

472

491

See

a i a DEFENDANTS EXHIBITS—GENERAL INDEX—Continued._

Ex. , oe ee Printed :

No a Vol. Page Vol. Page

40. General Blectiic Co. Australian Patent N aa, “ee

tS lle i ON oe ac eee es e 1 384 V 80

41. British Thomson -Houston S. Ltd., British Pat- ‘

ent No. 15,788 of 1914... 1 387 592

White U. S. Patent No; 1,159,307; Nov. 2. 1918. 1

43. Arnold U. S. Patent No. 1,118,172, Nov. 24, 1914. I 494

44. Hewitt U. S. Patent No. 1,025,464, May 7, 1912... 1

45. Hewitt U. S. Patent No. 682,699, Sept. 17, 1901 —

46. Hewitt U. S. Patent No. 682, , 1901... Bh

47. Kellys approximate duplicate tube of Avena a .

5 record Exhibit No. 0 II 816 5

4 Kelly diagram for Arnold Priority Exhibit No. 50 II 826 V 6

<<<<<<

, Kelly diagram for Western‘ ‘Electric Standard 102-D 8 .

Vacuum Tube JT II 82s V 630

50. Kelly diagram for tube 201-A kl... II 828 V 631

51. Kelly approximate duplicate tube of Arnold Priority n ie 3

„ . TT „ II 33 ——

52. Kelly diagram for Arnold Priority Exhibit No. 322 8

and approximafe duplicate tube ..... ASLO Se 88 II 834 V 633

8 53. Kelly diagram for Arnold Priority Exhibit ‘No. 32 5 1

and Arnold Audion 9.111111 II 836 V 634

5h Leih diagtam for, des ol Audion 9:111 ia.Arnold 3

he Priority Exhibit No. 34 . II 837 VI 635

5A. Kelly. diagram , showing correction of e 5 ey te

mue of Exhibit. No. 54 ....... 3 II 852 VI 636

55. Circulars of General, Electric tubes including tube , a

„„ 55 11 8% VI 67

56. Kelly ten Ml tae lot ds Beak on — II 84s —

57. Kelly diagram for Helium filled tube II 845 VI 651,

58. Kelly diagrarif for Nitrogen filted tube at different. 5

JJC) sepa sdavusdics cvsedevnnnasy IE 846 VI 6352

SB-A. Kelly diagram for Nitrogen filed tbe at different 8 es

, vasa swe op Vd veloni's oasis cones II 846 VI 653°

v Rally eae for Nitrogen filled tbe at digen en ie

ee ey ee ree eee . „ II 846 VI 6

8 Rely gram of eee e , II 84% VI 655

8 (att)

oy DEFENDANTS EXHIBITS—GENERAL INDEX—Continued.

Ex. Admitted - Printed 3

No. - * Page Vol Page

60. Diagram of Page 501 of Warmer Article, Proceed- ‘

ings of, Radio Engineers, showing curves for 5

tubes UV- 199, 201 V II. 854 VI 656

6 . Kelly diagram for Arnold priority Exhibit No. 32 . sala.

and approximate duplicate tube, -Plotted for ep „

. : nent 3/2 or its inbersse „ II 856 VI 657

62. File wrapper and contents, pee ag U. 8. Patent 5

CCC cies cs spas ac ccedeoniet as II 912 VI 659

63. F ile wrapper and contents Langmuir v. S. Patent i

e e TOS eC II 912 1 786

64. File wrapper and contents Langmuir U. S. Patent : :

Ne e o ecdbcrs ones II 912 VI 824

565. File wrapper and contents 3 U. S. renee N a

n . iI 912 VI 852

66. Physical Review, December, 1913, “A Powerful

ied Roentgen Ray Tube With a Pure Electron Dis. at

, charge,” by W. D. Coolidge egg II 913 VI 919

67. File wrapper and contents Coolidge U. 12 Patent ae 3

G00 ͤ ͤ(v0 P Kd cio bees ea II 913 VI 941

68. Drawing of pump used by Lamont II 915. VI 1031

69. Drawing of pump used by Lamont e ee II 916 VI 1633

70. Photograph .of Lamont preliminary pump ge aa II 916 VI 1034

71. Photograph of Lamont mercury pump EAST IE ta II 916 .VI 1035 |

72. Hewlett pump sketen 8 II 916 VI 1036

73. Clark pump sketten „ IJ, 16 VI 1037

74. Lamont account book (cash) . 8 II 917 VI 1036

75. Lamont account book (order), . II 917. VI 1048

76. Shop card, amplifiers G . II 918 VI 1054

77. Shop card, amplifier tubes II 918 VI. 1055

l Letter, McCandleis & Co to Federal Telegraph Co, „

0 / ̃ͤ AL; II 918 VI 1056

78-A. Letter, MeCandless & Co, to Federal ram e .

II 918. VI 1087

II 918 VI 1056

uc Later, Acces & Co. to Federal Kine Ce 1 le

| * 8 W W II 918 YI 1059

(xxiii)

_ DEFENDANT'S EXHIBITS—GENERAL INDEX—Continised.

Ex. ets ox . Admitted Printed

No. 3 5 Vol. Page Vol. Page

79. Letter, Feteral Telegraph · co. to McCandless & Co., 3

April 27, 1912 „„ II 919 VI 1060

79.A. Letter, Federal Telegraph Co. to McCandless 8 fe

ee NARs ß It 919 VI 1061

79-B. Letter, Federal Telegraph Co. to McCandless. & Co, 8

5 August 14, 19112··i 4 II 919 VI 1062

79. C. Letter, Federal Telegraph Co. to G. E. Lamont. 8 AS,

T 3 II 919 VI 1063

80. Watkin's photograph ............ N II 919 VI 1064

81. Drawing 88, Federal Telegraph Co. 11 919 VI 1055

82. Drawing 229, Federal Telegraph Co. II 919 V¥-1067

83. DeForest Audion structure, benen depositions ff

(Exhibit withdrawn) ))) ee os II 920 — —

84. Jahnke Tube, California depositions (Exhibit with- 1 i —

%%% „ sae

85. Letter, Commissioner of Patents to ios Lang- oy

— — » 5. tees cuseecsy II 923 VI 1009

86. Telegram, Albert. G. Davis to Edw. Williams, Sept. -, res

11111JJJ/%/%/%/%% Q» ˙ AAA ĩ cance II 923 VI 1070

87. Supplemental petition of Irving Langmuir that claims WES

— be added, Interference No. 40,380 ee. II 924 VI 1071

88. Letter, G. E. Folk to Commissioner 01 Patents, N 33

f ⁰ wu... senegal aetna II 924 VI 1075

89. Letter, G. E. Folk to Commissigner of Patents, Octo- :

„„ "2. es | RRS SEE ee ee ie eee II 924 VI 1076

90. Memorandum, Albert G. Davis on motion to dis- “sii 3

solve and to add counts, Interference No. * a 8

„„ Ae Seger ey V II 925 VI 10%

„91. Stipulation between attorneys for Langmuir and a 25 7

Arnold, Interference No. 40,8090 II 925. VI 1081

92. Conitmunication from Law’ Examiner, Stipulation „

amend, Interference No. 40,380, March 18, 1921. II 928 VI 1063

93. Langmuir U. S. Patent No. 1,280,769, Oct. 8, 1918 II 925. VI 10

94, Hull U. S. Patent No. 291,527, Jan. 14, 1919. . 11 925 VI 1090

95. Payne U. S. Patent No. 313,112, Aug. 12, 1919. II. 925. VI 1095

986. Hull U. S. Patent No. 1,313,187, Aug. 12, 1919. IT 925 VI 1099

Hull U. S. Patent No. 613168. Aug. 12, 1919. 11 928 VI 110

a C

DEFENDANT'S EXHIBITS—GENERAL INDEX—Continued.

* p@mstieca: Printed i

Ex.

N . . mi Vol. Page Vol. Page

98, Hull U. S. Patent No. 1,385,873, July 26, 1921..... II 925 VI 1108.

99.

_— U. S. Patent No. 387,984, Aug. 16, 21 9 II 925 VI 1117

1 100 to 278, incl., Arnold Exhibits in Ber“

ference Record and not reprinted. See Separate In-

r n e e eee II. 927

279. (No Exhibit.) 5 1 55 N

20 ‘Dushman Us S. Patent No: 172,961, Feb. 22, 1916 II 948 Vr 1126

Zul. Hawkins U. S. Patent No. 1,172,990, Feb. 22, 1916. II 948 JI 1

22. Meikle U. S. Patent No. 1,182,290, May 9, 1916. II 948 VI 113

28. Meikle U. S. Patent No. 266,517, May 14, 1918. II 948 VI 1137

284.” Langmuir U. S. Pateut No. 1,273,628, July 23, 1918. il 949 VI 1141

As. Langmuir re-issued Patent No. 15,278, Jan. 31, 1922. II 949 I 1144”

286. Berg U. S. Patent No. 1,352,242, Sept. 7, . II 949 VI 1150

W. White U. S. Patent No. l. 368,576, Jan. 11, 1921. II 949 VI 1153

28. Pratt U. S. Patent No. 1,374,679, April 12, 1921... IT 949 VI 1157

289. Alexanderson U. 8. Patent sa 1,477,413, Dec. 11. 3

„C AEM REA ne rted Ue. 11.949 VI 110

290. White U. S. Patent No. 1,506,468, Aug. 26, 1924. “IL 949. VI 1163.

291. Hull U. S. Patent ‘No. 1,523,776, Jan. 20, 1925. II 949 VI 1168

292. Alexanderson U. S. Patent No. 1.535,082, April 21, 1 n

JJC II 949 VI 1178

293 " Mlexanderece U. S. Patent No. 1,549,737, me 18, a a

JJJCCCCGCC0C0 00000 II 950 VI 1181

4. Langmuir U. S. Patent No. vey a 20 1925. II 950 VI 1194

295. Becker diagram for low current values of Sweet- ore

der, August, 1912; notes III 1799 VI 1202

296. Becker approximate duplicate Sweetser tube, ‘Avent

. C III 184 — —

7. Becker diagram for current pressure trelation in 1 9 5

wube, Defendant’s Exhibit No. 295. III 1804 VI 1204

298. Becker current temperature diagrams for. hydrogen enact 8

Sypeetser notes for Nov. and Dec., 1912 “UI 1809 VI 1206

299. Becker diagram for current pressure data of De- Wear ‘

- fendani’s Exhibit No. 298 reduced, to common ' 8

n VV III 1813 VI 120

5 (xxv) 7 *

DEFENDANTS EXHIBITS—GENERAL INDEX—Continued!

Ex. ; ee . - Admitted Printed

Vol. Page Vol. Page

ibe. Petition, specification, cath and 8 Langmuir „„

\ U. S. Patent No. 558,437, Oct. 20, 1925. III 1851 VI 1207

‘301, Amendment B to application, Langmuir U. S. Patent 5 5

Nin Ne. „ e 19GB. ics. swenvaks dies ss III 1851 VI 1:

302. Ale xanderson . Patent No. en July „ :

| 3 : III 1821 I

White U. S. Patent No. 198,632, Aug. 22, 1018. III 1821 VI 1

. Langmuir U. S. Patent No. 1,273,627, Joly 23, 1918 III 1821 VI

‘ White U. S. ‘Patent. No. 1,298,613, March 25, 1919.. III 1821 VI |

Langmuir U. S. Patent No. 1,301,279, April 22, 1919. III 1821 VI

. Alexanderson U. S. Patent No. 313,042, Aug. 12, 1919 III 1821 VI

_ Langmuir’ re-issued U.S. ‘Patent No. 15, 495, Nov. 21,

WER. ROT eves ET reds, Mibh phaaice Saws Oia owes III VI

Goldsmith U. S. Patent No. 1,323,759, Dec. 2, 1919 III VI

Goldsmith and Weinberger V. 8. Patent No. 1.334, ;

087, March 16, 1920 111 1822. VI

Alexanderson U. S. ‘Patent 0. 1,340,101, May ce

: III VI I

Alexanderson U. S. Patent 0. 1.373 931, April 5,

3 eS W eas Sn III VI

8 U. S. Patent No. 1,400,235, Dec. 13, 1921. III VI

Bradbury U. S. Patent No. 1,430,883, Oct. 3, 1922. II VI

Beverage. U. S. Patent No. 1,434,984, Nov. 7, 1922. III 1822 VI.

Beverage U. S. Patent No. 1,434,985, Nov. 7, 1922. III VI

Bradbury U. S. Patent No. 1,443,209, Jan. 23, 1923. III VI 1314

Becker U. S. Patent No. 1,455,099, May 15, 1923. III 1823 VI 1317

" Alexanderson b. 8. Patent No. 1466268; Aug. 28, 1

i : VI 1321

Traver U. S. Patent No. 1,470,582, Oct. 9, 1923. VI 1325

Alexanderson U. S. Patent No. 1,491,372, April 22 : 3

11 VI i331

Patent No. 1,544,202, June 30, 1025 VI 1327.

nan v U. 8. Patent: No. 1.80, 153, July 21, 1925 * . VI 1341 -

Letter, Charles Neave to H. B. Thayer, Oct. 10, 1913, .

vith Memorandum een Matters“ an- * M

III i883 VI 1349.

No 5 af

25. Letter, C. E. Scribner to D. C. Tanner, Feb. 10, 1915

. with Memorandum from H. D. Arnold to E. H:

. Colpitts anne se!

5 Physical Review, Vol. II, No. 5, Oct. 18. 1913, Ab-

. stract of Langmuir. paper The Effect of Space

9 enen.

rent in High VT

7. ‘Logarithmic plot of Volt-Ampere characteristics of

Type V n. ane, Exhibit No. val with

additions) 2%

2328. bun shits furnished to pati by defendant's wit-

/ ᷣ “ Vcc

2329. Tube used by Arnold in demonstration’ in Court of

7)VVVVVVVVVVV otins wince .

ee eee ee rhe Sa ree

31. DeForest tube sealed off from pump

. 332, DeForest tube prior to tifization of ‘magnesjum. .

833. DeForest tube in Laer, commercial form

D : . .

III 1859

VI 1358

III. 1886 VI 1361

III 1886 VI 1363

III 1887 VI 1364

BEE See

1II 1901. = —

III 1901 — —

SIE 1900). si Ss

te eee

.& :

; ¥ *

DEFENDANT'S EXHIBITS—GENERAL INDEX—Continued.

Vol. Page Vol. Page.

' CLASSIFIED INDEX.

: Admitted Printed

: . Vol. Page Vol. Page

Becker diagram - for low current values of Sweetser Lan. ö

August, 1912, notes „ In 1 vf 1202

. Becker diagram for current pressure relation in tube, ;

Defendant's Exhibit No. 296 111804 VI

Becker: current ‘temperature diagrams for hydrogen *

Sweetser notes for Nov. and Dec., 1912 III 1809 VI

Becker diagram for current pressure data of De fend- 5 AN

ante Exhibit No: 298 reduced to common voltage... III 1813 VI

„„ T oc OH AS II 916 ‘VI

Federal Telegraph Co., ‘Drawing 88 11 919 VI

Federal Telegraph Co., Drawing’ 229 It 519 VI

‘Hewlett pump sketch ........ Wann nen: II 916 VI

Hogan graph plotted between filament and site ar”

rents (Pltff.s Ex. 52, Hewlett v. A. T. & T. Co.,

S. D. of N. v.) f b

Kelly diagram for Arnold Priority Exhibit No. 30.

Kelly diagram for Western Electric Standard 102-D

Kelly diagram for tube 201-A

"Kelly diagram for ne Priority Exhibit No. 32

Kelly diagram for, Arnold Priority Exhibit No. 32

and: Arnold Audion 9.111,

Kelly.diagram for data of Audion 9.111 in Arnold

Ex.

/ t

_ DEFENDANT'S EXHIBITS—CLASSIFIED INDEX—Continued.

58-B. Kelly 3 tor en filled tube at. different

aß „ 5

„Kelly diagram of two-way telephone repeater

. Kelly diagram for Arnold priority Exhibit No. 32 and

f approximate duplicate tube, plotted for exponent 372

Lamont, Drawing of pump used by

Lamont preliminary pump, Photograph of

Lamont mercury pump, Photograph of

‘iy Logarithmic plot of Volt-Ampere characteristics of

B. Letter, McCandless & Co. to Federal Telegraph Coen

Type U pliotron (Plaintiff’s- Exhibit No. 60 with

Diagram on bare 591 of, P ]

ings of Radio Engineers, showing curves for tu

SUV-199, 201 and 201-A

Watkin's photograph i

Documentary, Miscellaneous. 95

mitted Printed

vol Page Vol. Page

igh 2

1 849 VI 681

eer

Amendment B to application, Langmuir U. S. Pat-

ent No. 1,558,437, Oct. 20, 1925. .

Circulars of General un tubes including tube

Communication Soom Law Exapeiner, Stipulation 40

amend, Interference No. 40,380; March 18, 1921..

Data sheets furnished to plaintiff by defendant's wit⸗

ness Kelly ... F AN. e S. n

Lamont account book en vis e

Lamont account book (order) ay @.....5.45. nee

Letter, McCandless & Co. to Federal Telegraph Co.,

May 4, 1912

5 a ee McCandless & Co. to Federal dme Co.,

June 9, 1912

Dec. 23, 1912

15. C. Letter, McCandless: & Co. o Federal Telegraph. Cos;

: Jem 8, 1913

III 1881 VI 1228

VI 637

11 925 VI 1083

VI 1364

VI 1038

VI 1048

vi 1056

56 vr 1087

a8 “VI s

1 918: VI-1059

DEFENDANT'S EXHIBITS_CLASSIFIED INDEX—Continved.

VV “Admitted” Printed

No. * ot eR: Vas Vol. Page Vol. Page

79. Ceuer, Federal ‘Telegraph Co, to McCandlets a co 5

W 3 . 11 919 VI 1060)”

79-A. Letter, Federal Telegraph Co! to McCandless & Co, :

u 26, j 02,5: „ I. 19 vi 1061

Nh Late, Federal Telegraph Co, to McCandless & Co, ube ;

August 14, 1912 55 1 919 VI 1062

79.C. Letter, Federal Telegraph Co. to G. E. Lamont, Oet. =

.... OE I II 919 VI 1063

88. Letter, Commissioner of Patents to Irving e F

„ & PRO, ee II 923 VI 1069

wre | ‘Letter, C. E Folk to Commissioner of Patents, Oc- ed

; e,, ANE II 924 VI 1075

89 Letter, G. K. Folk to Comme of Patents} Octo Beis 5

i ber eu oo e II 924 VI 1076

Sak: Memorandum “Cooper-Hewitt Matters” sets

5 neneddʒdõÿ ... 5 II 1653 Vi 1%

228. Letter, C. E: Scribner to D. C. Tanner, Feb. 10, 1915 . BP =

with Memorandum from H. B. -Arnold:to. E. H. 3

„C)otpitts annexed ............ Sa BAe II 1859 vI 1388

90 Memorandum, Albert G. Davis on motion to dissolve b i 9

nee a q

Gh EER Al de, Mae a Tenis aA Wile teeth u 925° VI 10%

76. Shop card, amplifiers (3-stage). ) 11 998 VI 1054

. Shop card, amplifier dubes N. Ii 918 VI 1055

91 Stipulation between attorneys for Langmuir and Arn- :

old, Intetference No. A eT eee II. 928 VI 1081.

19% Supplemental petition of ; Langmuir that claims out

be addgg, Interference No. 40. %ũ 11 924 VI 1071

86. Telegram, Albert C. Davis to Edw. Williams, Sept. FP’

15, 1916, 8 „ .. IT 923 VI 1070

. The wrapper and contents Coolidge b. S. Patent Ne

Sa iad eehte ae ee a LS. H 913 VI 901

8 File wraper- and contents, ‘Langmiuit U. S. Patent No.

. 1,588,436 Fare 3 82 e ee, II S I. 659

i 97 ü n Bere

7 Bi

‘pErENDANT’s EXHIBITS—CLASSIFIED DERConliyned.

W . Admitted Flinte

No. Vol. Page Vol. Page

63. le wapeer and contents Lang, S. Patent No. ‘

Rk RAI... CCC Hl 912 vi 786

64. File wrapper and contents inp 8. Patent No: ts

„% se ĩ a 11 912 vi 824

68. File wrapper and e Langmuir U. S. Patent Nos pees a

99 15225ͤ·ũ»ͤ·˖-·- ꝛꝛꝛ 666565 ee 912 VI a

300. Petition, specification, oth: and drawing, Langmuir. 5

Ur s. Patent No. 558,437, Oct. 20, 1925....... i 1851 VI 1207.

2 Vee Patent, Australian.

40. General Hleettie Co. No. 16% Oct. 22, 1914 U— 1 384 V 880

4 Patent, British, Ss cima a Sy

41." Thomson-Houston Co,, | Ltd, British, No: 1888 of - . ht aes

ANE eee ee — Rad ar ere we ee

: : oe ee patent, New Zealand. 5 De

- Lane, No. 35611, April a Fe AS ay Be

Patents, United States. 5 3

289, Alexanderson, No. 1,477,413, Dec. 11, 2 11 % VI 1160

1 Alexanderson, No. 1,535,082, April 21, 1925 11 949 VI 1178

Alexanderson, No. 1,549,737, Aug. 18, 1922 11 950 VI 1681

WM. Alexanderson, No. 1,102,628, July 7, 1914 1II 1821 ‘VI 1233

‘97: Alexanderson, No. 313,042, Aug. 12, 1919 ITI 1821 vi 1263

In. Alexanderson, No. 1,340,101, May 11, 190 111 1822 VI 1280

312. Alexanderson, No. 1,373,931, April 5, 1921 ........ III 1822 VI_1285 -

319. Alexanderson, No. 1,466,263, Aug. 28, 1923. IIT 1823 VI 1321+ .

Al. Alexanderson, No. 1,491,372, April 22, 1924 III 1823 VI 1331

43. Arnold, No. 1,118,172, Nov. 24, 19146. 1 „ 610

zn. Becker} No. 1. 488,099, May 15, 1923. n „ III 1823 VI 1317

286. Berg, No. 352,242, Sept. 7, 190 oe 11 949 VI 1150

us. Beverage, No. 1,434,984, Nov. 7, 1922 III 1822 VI 1297

316. Beverage, No. 1,434,985, Nov. 7, 22 III 1823 VI 1303

d. Bradbury, No. 1,430,883, Oct. 3, 1922 Ii 1822 VI 1293

zu. Bradbury, No. 1,443,209, Jan. 23, 19222 III 1823 VI 1314

0 ¥ (xxxi)

' a 1 . : — *

2 bd . * >

8 ‘DEFENDANT'S EXHIBITS—CLASSIFIED INDEX—Conitinued.

34.

36.

280.

—

24.

309.

eee,

* Clark, No. 1,121,803, he HW 5

Clough, No. 246,054, Nov. 13, 1917 . J

Coolidgt, No. 1,082,933, Dec. 30, 191i

Dushman, No. 172,961, Feb. 22, 1916 ..............

Dwyer, No. 596,654, Jan. 4, 1898 9888 :

Edison, No: 411,019, Sept. 17, 1889 ...............

Fleming, No. 803,684, Nov. 7, 1905 ................ ö

Friedrich, No. 1,088,677, Jan. 6, 1914 .

Goldsmith, No. 127, Der. 2 19199

f Goldsmith and Weinberger, No. 1, 334,087, March 16,

—: ³ ²³ĩ oe

Hawkins, No. 1,172,990, Feb. 22, 1—2— .

Hewitt, No. · 1.025,64, May. 7, 1912.

Hewitt, No. 682,699, Sept. 17, 19o)h0·˖̃/%o:

Hewitt, No. 682,692, Sept. RRR Cane

Hull, No. 291,527, Jan. 14, 191999

Hull, No: 1,385,873, July 26, 1911211

Hull, No. 387,984, Aug. 16, 191112

Hull, No. 1,523,776, Jan. 20, 1925 ............ 4...

Hull, No. 1,547,153, July 21, 1925 ........... yet

Langmuir, No. 1,280,769, Oct. 8, 1918 .......... 8

Langmuir, No. 1,273,628, July 23, 1918 8

Langmuir, Re-issue; No. 15,278, Jan. 31, 1922.

Langmuir, No. 1,558,437, Oct. 20, 19 25.

Langmuir, No. 1,273,627, July 23, 1918 eis fee

‘Langmuir, No. 1,301,279, April 22, 1919

Langmuir, Re-issue, No. 15,495, Nov. 21,. 1922.

Mackay, No. 1.208, 597 Dec. 12, 1916 ............

Malignani, No. 537,693, April 16, 189 :

Marshall, No. 205,002, Nov: 14, 101%

Meikle, No. 1,182,290, May 9, 1916 .............. 1

Meikle, No. 266,517, May 14, 1918s Ss

Merritt,-No. 909,811, Jan. 12, 1909 ................

Payne, No. 313,112, Aug. 12, 19119

Payne, No. 1,400,235. Dec. 13, 1912

Pratt, No. 1,374,679, April 12, 19211 bak 9

(xxxii),

199. se

382 V 845

196. V

197 V 150

1 198 V 0

1822 VI l27t

1 197 V @

III 1822 vr 1276

II 948 VI 11%

1 883 v 6

1 583 V 619

1 883 V 622

u. No. | II 225 VI 1030

Hull, No. 1,313,187, Aug. 12, 19119 .

Hull, No. 313,188, Aug. 12, 1919 aero

II 925 ‘VI 10

II 925 VI 1104

11 925 VI 1108

II 925 VI un

II. 949 VI 1168

III 1822 VI 1267

1 200 V 802

15196 V 4

I 199 Y 433.

11 948 VI 1133

II 948 VI_1137

948 VI 11% .

III 1823 VI 1341.

II 925. VI 1085.

Il 949 VI 111

1 949 VI 1144

II 950 VI 1194 -

III 1821 VI 1246,

IIL 1821. VE 1257

I · ime

11 925 VI 1098

III 1922 M 1299

II 949. VI 1197

_ DEFENDANT'S EXHIBITS_CLASSIFIED INDEX—Continued.

18 Admitted Printed f

. Ne. Vol. Page Vol. Page

12. Recklinghausen, No. 946,068, Jan. 11, % ce bee

y. Soddy, No. 859,021, July 2, 1907 .......... e

2 ‘Thatcher, No. 1,028,636, June 4, 1912 14 th AM 206

320. Traver, No. 1,470,582, Oct. 9, 1922 III 1823 VI 1325

2. Wuite, No. 1,159,307, Nov. 2, 191i W

. White, No. 1,365,576, Jan. 11, 1921. I 24 VI. 1153 1

290. White, No. I. 806,468, Aug. 26, 1924. u 94 VI 1163

303. White, No: 1,195,632, Aug. 22, 1916 ...... III 1821 VI 1241

358. White, No. 1,298,613, March 25, 1999 — TET 1821 VI 1251

2. White, No. 1,544, 202, June 30, 192 ree III 1623 VI 1337

Sad na Publications.

20, W Ade of Arts and Sciences, Proceed -

ge ings of the, Vol. XIV, No. 1, August, 1909, pp. 1-17, —

Friction in Gases at Lo] Pressures, by ee Hogg 1. 198 V_ 225

8 American Electrician; Vol. VIII, No. 1, May, 1896, 8

“Crookes Tubes and Experiments with Roentgen

i Rays „ by Thomas Dunaa nn N

33. W Institute of Electrical Engineers, . Proceed. <a

_. ings of, June 25, 1912, pp. 1207-1217, “Vacua,” by 11 55 as

by W. R. Whitney .....-:.: FES, OS A a. f 199 V 491

4. Annalin der Physik, Vol. 12 (1881), pp. 425445,

A New Construction of ‘the Mercury Pump of

Toepler and Deseribing Sofne Experiments Made : 8

2 Therewith,” by Bessel- Hagen I 196 V 16

10. Annalin der Physik, Vol. II, (1900), -pp. 389.354 :

: _ “Production of Cathode Rays by Ultra-Violet

5 Light,“ by P. Lenarr lll & 1 197 We AE.

- 10-A,Annalin det Physik, Vol. VIII, (1902), 5p, 9.1.

“Photoelectric Action,” by P. Lenard N L ee Mi

21. Annalin der Physik, Vol. 31, (1910), pp. 169-304,

“A Contribution to the Knowledge. of the Inertia . 8

of Moving Electrons,” by E. Hula 1 198 V 241

25. Annalin der Physik, Vol. 32° (1910), pp. 673-738, 5 i

ö “Conduction of Electricity in Extreme Vacuum,“ * *

by J. E. Lilienfeld e F

35.

DEFENDANT'S EXHIBITS—CLASSIFIED INDEX—Continued,”

A der Physik, Vol, 36 (1911), op. 995-1026,

“Reflection and Secondary Radiation of Photo-

electrically Liberated Cathode Rays,“ by A. Gehrts ©

Annalin der Physik, Vol. 41. (1913), pp. 1-26, Con-

d oerning the Pressure of Cathode Rays,“ by =o V.

Atti Della Reale 3 Dei Lincei, Vol. XXI

(1912), pp. 235-239, “On Electromagnetic Wave in-

dicators Based on the Principle of Electronic Emis-

Admitted Printed

Vol. Page Vol. Page

;

sions from Incandescent Wires,” he Duhon

Majorana

30. A. Atti Della Reale Accademia Dei Lincei; Vol. XXI

(1912), pp. 274-277, Ou a New Type of Indicator

11.

31.

of Electromagnetic Waves Based Upon Electronic

Emissions From Incandescent Wires,

Majorana

Electrical World and 3 vol. III, May 21,

1904, pp. 963-965, “A Resume of Incandescent Elec-

tric Lamps Exhausting,” by S: K. Doane 5

Fortschritte uf dem Gebiete der Rontgen Strahlen,

Vol. 18 (1912), pp. 256-263, An X-Ray Tube o

An Optional and Instantaneously Attainable Degree

of Hardness Independent of Vacuum,” by J. E. Lil- -

_ienfeld and W. J. Rosenthal

‚G— ñͤ— 72

25-A. Leipsiger Berichte, Vol. 63, (1911), pp. 534-539, “The

— 1

29.

66.

James De war

- Conduction of Electricity in Extreme um by

IJ. E. Lilienfeld

Nature, July 15, 1875, p. 217, “Charcoal Vacus," by

‚G— 0: 2 ee a

Nature, Nov. 21, ioe; se: ain Caan

Kathode in a High Vacuum,” by Frederick Soddy..

Physical Review; Vol. 32, (1911), pp. 492-511, Dis-

charge from Hot CAO,” by C. D. Child:

Physical: Review, December, 1913, A Power ful

or ee

on a eS ee

by Quirino

199

: 199

199

197

199

V. 403

Vv 7

913 VI 919

DEFENDANT'S EXHIBITS—CLASSIFIED INDEX—Continued,

3 Ex. vas ° 4 , 5 N rs 5 3 8

326: Physical Review, Vol. II, No. 5, Oct. 18, 1913, Ab-

gcgt8tract of Langmuir paper The Effect of Space

: Cage: tah Reel Gaia: the ON

rent in High Vacuum i

3. Physikalische Zeitschrift, Vol. 29, pp. 46-50, 1909;

“Tests of the Methods Used for — High

Vacua, by Scheel & Heusse „

19. Physikalische Zeitschrift, Vol. 9 (usch, p. 193,

5 Reply to Soddy by Lilienfeld eee

2. Physikalische Zeitschrift, Vol. 10 (1909), pp. 168-176,

“Concerning Siow Cathode Rays,” by O. v. Baeyer.

Physikalische Zeitschrift, Vol. XIII (1912), pp. 594-

A 595, “About the Distribution of Light. During the

‘Admitted Printed

Vol. Page Vol. Page

III 1886 VI 1361

1 106 y 8

1 186 v

Stratified Discharge’ in Vapors of Alkali Metals,“

by Kunz and Kemp ...... FF

9. Royal Society, Proceedings of the, A, Vol. 64, *

231- 238, Liquid Hydrogen for the Production of

‘High Vacua,” by James DeWar ........ .

14. Royal Society, Proceedings of the, Vol. 74 (1905); pp

476-487, “Conversion of Electric Oscillations Into

Continuous Currents by Means of a Vacuum

> Valve? ty Ji M 600A ews

8. A. Royal Society, Proceeditigs of the, (1907), Vol. 78-A,

pp. 429-458, “Calcium as an Absorbent of Gases

for the Production of High Vacua and Spectro-

copie Research,” by Frederick Soddy ............

16. Scientific American Supplement, No. 1568, Jan. 20,

1906, pp. 25129-25131, “On the Electric Con-

5 ductivity of a Vacuum,” by J. A. Fleming

26, Pein. der Deutschen Physikalischen Gesell-

—

1 197 V 83

I 197 V- 142

1 1580 V 192

‘1197 V 165.

_ sthaft, Vol. 13, (1911), pp. 601-606, “On a Method

of Producing Very Soft Roentgen’ Rays in the

Highest Vacuum,” by H. Dember 5 5

N Physical Exhibits.

9. Arma tbe wed by, u demonstration in Court ef

Blue Glow N 8 N ee eevee sees

(

1 198 V %

DEFENDANT'S RXHIBITS CLASSIFIED INDEX—Continued.

Ex. Ai. A Admitted . Printed

‘No, : Vol. Page Vol. Page

296. Becker approximate duplicate Sweetser tube, A f J *

ü — TRO, ie 5 t ee

83. DeForest Audion structure, (cited depositions , : ;

(Exhibit withdrawn) ................0.......2... E

330. De Forest tube as placed on pump UL

331. DeForest tube sealed off from pump 1 t %% ae

332. De Forest tube prior to volatilization of magnésium . W902 — — |

333... Pe Forest tube in completed commercial form III 1003 ae

84. Jahnke Tube, (California depositions). [Exhibit with- - at

66 ee ERRE hs Dashes ents eee

47. Kelly’s approximate orga tube of — prior. ‘

ity ‘record Exhibit MoeO SENAY el. Re Na

51. Kelly's approximate e tube of Arnold Prior- a

i 22 Noy 33236). 3s ks oo: 1

56. Kelly Helium filled . n 11 86 —:

° af Sb ae 8

INDEX TO DEFENDANT'S EXHIBITS

INTERFERENCE RECORD.

Inter. Trial Inter.

Record Ex. ss Cae Record

“Rx No. No. 7 80 . ) Page

I. 100. Van der Bij! Diagram No. 1. VERN e e e

2. 101. Van der Bijl Diagram No. . „. aed 1% (OS

3. 102. Van der Bijl Diagram No. 3232322 een e

4. 103. Van der Bijl Diagram No. 4. n — 426

5. 104. Van der Bijl Diagram No. S. ee Nine 427

6. 105. Van der Bijl Diagram Nor inne rip CC a ew LES tery

7; 106. Van der Biji Diagram No.7 e HeeNee's „ eee 429

8. 107. Van der Bijl Diagram No. 8......... . eee N 430

9. 108. Van der Bijl Diagram No. 99 a. 2 PUES Tee aie, «|

10. 109. Van der Bijl Diagram No. 10 l nel @8e

* 110. Vacuum Tube No: 17,8292 eee 2 7 =

u. 111. Van der Bijl Diagram Ne. 1 4 vec eti sce es 433

12, 112. Van der Bijl Diagram No, 1122 ee ee 434

„ i „n ¶ 658s dente se tcces eos 5 es

2. 114. Millikan Sketch, No. 1 . Lops Gee

I- 115. Arnold Exhibit No. I JKJ‚„k1“.. Heyes 5

TB. 116. Arnold Exhibit No. Al-. e vapagniees n 438

. 2-A. 117. Arnold Exhibit No. 2-A ....... eee . 439

2-B, 118. Arnold Exhibit No. 2-3. e e voce 0

id /// = 441

3.B. 120. Arnold Exhibit No. 338 ees 2 — 442

3-C. 121. Arnold Exhibit No. 3-C ............. . — 443

b Bt No. Dos. sos voice vince cs cseuscwever'ss’ .. 444

4A. 123. Arnold Exhibit No. 4pKkk . . piace

4B. 124. Arnold Exhibit No. J 00 44

„125. Buckley Article ret i ee lo, Ae

1. 126. Calibration Curve No: ........ ee «Mee

2 17. Calibration Curve No. 2. „% eter ee 451

Not given Exhibit No. in Interference record. .

' fReferred to in Interference record as Arnold Exhibits...

pel (xxxvii) 45 5 i 5

mnN TO DEFENDANT'S EXHIBITS IN INTERFERENCE RECORD

» Inter. Trial wag ites 3 ted *

Ex. No. No. aris : ets ate Paige

13. 128. Van der Bijl We Fe —*-•ũ—2j 444 6 45²

14 129. Van der Bijl Diagram No. 14. 8 e

130. Van der Bijl Diagram No. 8 simplified d 21

18. 131. Van der Bijl Diagram No. 15 ....... . e ea

16. 132. Van det Bijl Diagram No, 16. 1

17. 133. Van der Bijl Diagram No. 177 34. „ 437

18. 134. Van der Bijl Diagram No. 1. 8 458

„135. Photograph of Tube R. D. O. 166 „ 459

1: 136. Richardson Exhibit No. 11. n N

2. 137. Richardson Exhibit No. ꝶ27z 2 2 0

* 138. Vacuum Tube No. 17,482 (same as Exhibit No. 100 Be „

eee, ca vencis. i064 sede dade be... a

40. 140. Van der Bijl Test Circuits for Amplifier e 517

41 141. Van der; Bijl Circuits for Detector ee a o 80

42. 142. Van der Bijt Comparison Test Circuits for Detector 521

43. 143. Vacuum Tube Conference Report of February 8, 1918. 93

44. 144. Signal Corps Specification for Receiver Tubes, Dated Fett,

ates Te ͤB ͥ¶ddddd ͤ Ceili as - 968

48. 145. Test Specification for Transmitter Tubes, A Weben ee

5 . %%% des EN AR EI AMOR coe og cb es . 973

406. 146. Diagram for 3 Kenotron "Experiment Carried to ;

EES esa

%% ũ ũun.̃̃ ꝗ ͤůàm ; Ee EO hs SV AEE 535

7. 147. Diagram ter Regulator Kentitrot Experiment at Graded :

Pressures, with Tungsten Filament „„ 830

48. 148. Diagram for Regulator Kenotron Experiment i at. Graded

oe Pressures, with Wehnelt Cathode ........ . 540

49. 149. Diagram Inustrating Effect of Filament Voltage Drop. 336.

30. 150. Logarithmic Diagram Mustrating 19 of Filament vol. 2

1 tage Drop . %%% 0ò V 2 ae

a 181 Comparative Diagram Langmuir Exhibits.33 and 35 561

cue 132. Logarithmic i at Different Pressures with Web;

: nelt Cathode 3 e e ‘ven SO

Not given Exhibit No. in — i

ey ’ | @exxviii)

Sh EATERS

un x 10 DEE DANT'S EXHIBITS IN INTERFERENCE RECORD

es Ex. ; . . . ead

EXT No. ‘No. 8 : | 3 _ © Page

83. 183. Diagrams on Suécessive Days. with Wehnelt Cathode, Using

Liquid Air so PUES a NUS TE be RIOD TNs cages 565

% 54. 154. Logarithmic. Diagram Corresponding to Exhibit 53, Rebut

. ß ke, 567

55. 155. Characteristiés for canta Tube with Filamentary ‘Tung: .

1 sten Anode nN, ̃ TI 574

56. 156. Logarithmie Plot Correspor ing to Exhibit 55, Rebuttal’ |

5 Fig. 15 ..... . N 17 cases snes 576

. 1% Characteristics for Unbaked Tube with Coiled Filamentary

. Tungsten Anode N. wigeay ae eee 578

18. Logarithmic Plot Corresponding’ i to Exhibit 57, Rebuttal

„% ĩ ys Tie Md: ass snes „„ N 580

359. 159. Characteristics Corresponding to Exhibit 57, Fig. 17, but

(°° with Higher Temperatures ....:......-. V 381

60. 160. Characteristics for Unbaked Tube with Equat 1 e ga

: Tungsten Electrodes ö• 242465 N . 382 N

61. 161. Characteristics for Unbaked Tube with Equal Parallel es.

dan eee e es Baia PR we Nos 584

62. 162. Logarithmic Plot . to Exhibit. 61, Fig. 21 Se 2 585

63. 163. Characteristies Corresponding to ERhibit 61, Fig. 21, “but

7 a Pushed is Higher Curren iss 4 \ 587

64. 164. Leguctibenie’ Plot: Ge epd ae e Wee 65 Fig. 23 . 888

es. 165 Characteristics for Unbaked Tube with Equal een Her-

. VA Exhibit 65, Hie 8 *

5 ene, AW. 592

68. 168. Characteristics for Un

pin Electrodes ie 593

69. 169. Logarithmic Diagram Tilustrating 2/3 Slope for Consider- |

ie ge aes able Gas Present (based on Exhibit 47, Fig. 7) ........:. 601

70 170. e eee ot ere Exhibits 32 are

JW VVT 617

71. 71. Plate Current-Grid’ Volt Characteristic tec Standard Tele” |

5 phone Repeater Tube Nee .

ee Gal) é .

INDEX TO DEFENDANT'S EXHIBITS IN INTERFERENCE RECORD

— Continued.

later. Trial ; Inter,

Record Ex. Record

Ex. No. No. Page

72. 172. Current - Voltage and 1 Voltage Characteristics tor a

Standard Telephone Repeater Tube ..... 24222 2 4 6%

73. 173. Logarithmie Plot corresponding to Exhibit 72, Fig. 37..... 626 3

74. 5 174. Diagram showing two 372 slopes for a single tube ......... 5 ;

75. 175. Diagram showing three 3/2 slopes for a single tube 637

76. 176. Logarithmic diagram corresponding to Exhibit 67, Fig. 27 .. 638

77. 177. Comparative diagram for DeKorest tube 7-A and .General

oe ee Electric tubes VT-11 and VT-13-........4...++. . 650

78. 178. Volt-ampere diagram for small Western Electric tube 651

79. 179. Logarithmic diagram corresponding to Exhibit 78, Fig. 44 653

80. 180. Diagram for small Western Electric tube, eorrected for

contact potential differ ene „

81. 181. Logarithmic diagram corresponding t to Exhibit 80, Fig. 46. 655

82. 182. Diagram showing volt-ampere and volt hm chargeteris- 3

ties for VT. 1 tubtte 3 1 686

83. 183. Diagram showing logarithmie volt ampere characteristics. N

ee for VT. 1 tube Ane % ͤ ⁵ ͤ-„ ²⅛˙ an 657

84. 184. Diagram showing plate current-grid volt characteristics b

; tor VII be JJ ˙ ĩ ͤͤ ck + Kable «+. * 658

85. 185. Diagram for type W radio transmitting tube ..... „

86. 186. Logarithmic diagram fof type W radid transmitting tube. 660

87. 187. Diagram showing characteristics for type G power tube 661

88. 188. Diagram showing logarithmic characteristics for ne. G

: ee PORE soca. caconcsas ars eee eee cakes ov iss oasis 662

89. 189. Diagram showing characteristics for type ‘I power tube 3

90. 190. Diagram showing N characteristic for type 1 5

be CCC „ 55 a 605

91, 191. Diagram obtained by pushing a via tube to eee :

. „b J%%% HED obec decbere 671

92. 192. Logarithmic’ 1 5 to Exhibit 91, Fig. 577. 62

ae 1 i Diagram for.a VT-1 tube to. excessive . 1 then ce

oe Spee, for decreasing voltages. .. et Fin clas. oe a

94. 194. Logarithmic diagram corresponding to Exhibit 93, Fig. 59. 675

95. 195. Arnold Exhibit No, 95, Tube for Figs- 8. 12, 13. and 14. xp

96., 196. Arnold Exhibit No. 96, Tube for Figs; 15 and 16 ....... 3 5 i

00 a

Inter.

Record

Ex No.

98. .

‘een

INDEX TO DEFENDANT'S EXHIBITS IN INTERFERENCE RECORD’

Trial ea Inter.

Ex. Record

No. 1 . 13 Page

197. Arnold Exhibit No. 97, Tube for Figs. 17, is and 19. —

198. Arnold Exhibit No. 98, Tube for Fig. 00 aa —

199. Arnold Exhibit No. 99, Tube for Figs. 21, 22 and 40 2 —

200. Arnold Exhibit No. 100, Tube for Figs. 23, 24 and 39. —

201. Arnold Exhibit No. 101, Tube for Figs. 28 and 2. oh —

202. Arnold Exhibit No. 102, Tube for Figs. 27 and 1 —

208. Arnold Exhibit No. 103, Tube for Fig. 98. a

204. Arnold Exhibit No. 104, Tubs for Figs. 36, 37 and 38 ...... —

205. Arnold Exhibit No. 105, Tube for Figs 44, 45, 46 and 47 —

206. Arnold Exhibit No. 106, Tube for Figs 48, 49 and 50. —

207. Arnold Exhibſt No. 107, Tube for Figs. 51 and 52 „ mi

208. Arnold Exhibit No. 108, Tabe for Figs. 53 and 8. =

209. Arnold Exhibit No. 109, Tube for Figs. 55. and 56 . ices a —

210. Arnold Exhibit No. 110, Tube for Figs. 57 b

211. Arnold Exhibit No. 111, Tube for Figs. 59 . * r

212 Direct volt-ampere plot for unbaked tubular bulb ....... — 708

213 Logarithmic volt-ampere plot for. unbaked tubular bulb . 1

214-222, inclusive. Diagfam for batch of unbaked tubes 3

i and tested December 12 and 13, 1919 wi — 7456 to 754

223. Volt-ampere diagram for tube of Van ae Bil renee XQs.

1792 and 201 ..... he e 3 3

224. Diagram for tube No. 35. 8 PRISE teeveee 78

225. Diagram for tube Na 36 eee yeep we

226. Diagram for tube No. 38 e is 5 8

227. Diagram for tube No. 45 e „ „

FVrEWF Oe a as +e | 5 4 767

229 Diagrams for tube No. 50 5 768

230 nee ie ee Me Rae ee

BERET | . go y 770

232 Diagrams for tube No. 67 ee 555 8 pf 771

254. Diagram for tube No. (ũ . Aiea, ip

235. Langmuir Exhibits 16 and 18 plotted together .....:....... 38338

236. Logarithmic Diagram tor Von ae data | (Phys. 2 5 Peet

C00 en et

Nei given No, i in Interference record. . rare 8 5 a i AS

eee , = „„

0 5 7 . oa ; 7 Cc *

mx TO DEFENDANT'S EXHIBITS IN INTERFERENCE RECORD _

—Continued.

Inter, . Trial ; : Inter

Ex. No. No. ew Page.

— ae A Certified copy of Armstrong. testimony in Marconi v. De-

Forest case „ Stae dhdsbe des 97 4 59 Withdrawn

pr. I. 238° -Photostat copy. of Richards Book 4, pp. 137, 138 and

165. Dates and Diagranis for meeting with De Forest;

address of McCandless; and. notes on the artificial nee: ES

8 continental line test 3 4 9 . tee printed

Pr. 2. 239. Audion 1-A. A Physical Exhibit Woes Altes

Pr. 3. 240. Photograph of Audion 7 K... Nec . Bas

Pre 4. 241. Audion No, 11. A Physical Exhibit 5

Pr. 8. 242. Photograph of Audion No. I eva a — *

Pr. 6 243. Arnold diagram of audion circilits lor November 1, 1912... - “

Fe. 7. 244. Photostat copy of. Pierce Book, 20, pp: 16 to 41, in-

clusive. ‘Tests of DeForest. A „„ ‘

We. 8. 245. Blueprints of sketches accompanying Exhibit / . 4,

Pr. 9. 246. Comparative diagram for Audion 7-4 and type G plio- d

„ c Ne ee ae *

Pr. 10. 247. Photostat and blueprint copy of Pierce=Arnold memo-

randum of December 18, 1912, on “Efficiency of the

Pale, Fas le cane S 5 998

Pr. 11. 248. Copy of order for molecular pump . 8

Pr: 12. 249. Photostat copy of Letter to Crandell of March 17, 1913.

ding date of Arnold’s trip to Princeton

Pr. 13. 250. Photostat copy of Kendall Book 28, p. 25, noting ar-

ie meal of new ‘molecular pump ..:.....3......5++ eve .

Pr. 14. 251. Photostat copy of Trimble Book 18, pp. 89 to 95. Rec-

l ord of pumping twenty audions in January, 1913 eee 9

Pr, 18. 252. Photostat copy of Arnold-Nicolson 3/2 law memorandum “

Pr. 16 253. ent copy of Arnold-Kendall we law computations...“

8 . poacedha ‘ty "Pe? are exhibits referred to in Interference.

record as “Exhibits accompanying the statements in behalf of Arnold on the

Question of Priority.”

* Arnold Priority Exhibits Nos. 1 to 41, inclusive (Defendant's Exhibits Nos

. 238 to 278 inclusive in this case) not printed, but are bound in chronological e.

der in brown cloth back book. .

INDEX TO DEFENDANT'S EXHIBITS IN INTERFERENCE RECORD

Inter. Trial Nos ¢ . ; Inter-

Bx No. No. 3 2 ae

Pr. 17. 254. Photostat er el ArnoldIetter to Wiegel May 5, .

1913, giving 3/2 law computationnln nnn printed

Pr. 18. 255. Photostat copy of Pierce, Book 20, pp. 101 to 18, relating to

use of new molecular pump with Audions 20, A and B. ake

~ Pr. 19. 256. Blueprints of sketches accompanying Exhibit 18. is

Pr. Al. 257. Photostat copy of selected- cards from nn carl

* index. Cards 1 tö 10, 23, 64 and 100 5 A......... 000005 “

2 a relating to the audion installation at Philadelphia ....:., “

Pr. 22: 259. Photostat copy of Kendall Report of September i

ay 1913, on two-way audion repeater with artificial lines.

Pr. 23. 260. Photostat and. blueprint copy of Kendall memorandum Fes.

: October 1, 1913, on the use of the audion for. repeating... “ ~

Pr. 24. 261. Blueprint of Kendall cord circuit audion L — —

5 ande 2. *.

Pr. 25. 262. Photostat copy of ‘Kendall Book 42; p. 5, on the com-

mencement of commercial service at Philadelphia

Pr: 26. 263. Photostat and blueprint copy of Kendall Report of October __

. a 22, 1913, on commercial operation of audion at Philadelphia is

Fr. 27, 264. Photostat copy of Kendall Book 42, p. „ for December 20,

3 1913. Record of commercial service for audions at Phila- Ax.

PP ee e PSP RGR Es

Pr. 28. 265. Audion 6.11 a Physical Exhibit 5 n é

Pr. 29. 266. Photograph of Audion 6. il. . *

Pr. 30. 267. Audion 64, a Physical Exhibit ................. 3 .

Pr. 31. 268. Photograph of Audion 6 . is

Pr. 32. 269. Audion 100, a Physical Exhibit. fits 2

Pr. 33. 270. Photograph of Audion 10 4 1

Pr. 34. 271. Photostat copy of Pierce Bock 20, pp. 182 anf bay and

Es. 93571. Data on Audion 9.11. . * 2

Pr. 35. 272. Photostat copy of Colpitts Memorandum of Maren 27,

1913, om audion improvements nee .

**Arnold Priority Exhibits Nos. 1 to 41, inclusive"(Defendant’s Exhibits Nos.

286 to 278, inclusive, in this ease) not printed, eS e

“ter in brown cloth back book.

(xii

A - : os 0 ; ey .

INDEX ro DEFENDANT'S EXHIBITS IN INTERFERENCE REC

—

bot ON

/ 7 —

8 ‘copy of Nicolson’s daily 3 sheet *

for February 4, 1913, fixing date for Exhibit 15 ......... . Printed

Photostat copy of Richards Book. 4, pp. 155°: and 156, 4

on connecting audion grid and plate with a et resist- 5 *

%% cas ck sent tse cee ca ĩͤ + <p ve"

Photostat copy of Pierce Book 20, p. 146, showing re-

sistance - capacity combination in audion plate circuit . ee

Life: Test Record in April. 491ũ .. : . as

Data from Langmuir’s Lamp No. 2 of November, 1912 . 2

Plot to exhibit the inaccuracy of a straight line relation ae "

I 2/3 and E as an indicator of high vacuum ............ ~ ee

** Arnold Priority Exhibits Nos. 1 to 41, inclusive (Defendan’’s s Exhibits Non

der in brown cloth back book.

238 to 278, inclusive, in this case) not printed, but are bound in ee or-

pap

\ .

Usrrep SraTEs OF Amenica, Joos Aa

ra OF DELAWARE, ai grat :

Bu Ir Rememseren, that at a District Court of the United .

‘States for the District of Delaware, begun and held at the United

States Court House and Post Office Building, in the City of Wil-

mington, in the said District of Delaware, at the time and place

required by law, N other, the e N were as

had, to wit: 1 A

‘Guyana, Exgornic Company,

Plaintif 7

fe eas > ee a No. 589 In Egurry. |

tena Font Bains PANY, ve Hi 1 85 5 8

ae Defendant: “geod:

| DOCKET ENTRIES ge

Jan. 26, 1626 Bill. of complaint filed; same ii gubpena is-

: sued, returnable February 15, 1926. 7

„Marshal returns on subpœna, “Serv ed, 5 he;

same day writ filed. me

Report to Commissioner of Patents mailed _ a a

copy filled.

Answer filed.

Stipulation . filed ;, same, day sates 3

time to file answer; same day order filed. i

Order granting leave to file stipulation; same

day order and stipulation filed.

. Defendant’s bill of particulars filed. :

Defendant 8 supplemental bill of particulars

ee .

Order granting ‘defendant leave: 10 amend an-

oa wer; same day amendment filed. .

Oct, 11, 12, 18, 19, 20, 21, 22, 25, 26, 27, 28, 29, 1926. Trial before

2 *

- Docket Entries, No: 569

1, 2, 3, 4, 5, 9, 10, 11, 1926. ‘Trial before the oe

28, 1926. Bepositzöns of Mrs. A. W. F. Beck, B

Hyde, Palmer Hewlett, Leland B.

G. E. Lamont, Ralph R. Beal, Austin L. Tul

James O. Watkins and Harold Lee N

on behalf of defendant, filed.

11, 1926. Record of proceeding at trial filed. ee

„12, 13, 14, 1927. Hearing on pleadings and proofs, —

3, 1928. Opinion of court filed. |

16, 1928. Final decree dismissing bill of complaint, wil

2 n cCeocgts to be taxed; same day decree filed. :

. 23, 1928. Plaintiff’s petition for appeal with assignmeny

ä ‘of error filed; same day order allowing s

peal, bond in the sum of $500; same dy

order filed.

Order approving bond on yey in the sum d

$500.00 with United States Fidelity a

Guarantee Company as ne same ¢

bond filed. :

Citation issued. 8

Citation, with acceptance of service by solic

for defendant-appellee, endorsed. heredl,

: Report to Commissioner of Patents mallets

copy filed.

; “Stipulation as to transeript of ‘record fi

‘same day order approving stipulation; a

bese order filed. ee

Docket Entries, No. 598

emen Eren Sei

5 ae rs 1 75 ee , . ae

aa v. 5 No. 598 In Baurrr.

De Forest Rabl Company, ,

a a 3

N DOCKET ENTRIES

Apr. 28, 1926. Bill of complaint filed; same day ida is- ~ 7

. + gued, returnable. May 18, 1926. : :

Apr. 30, 1926. Marshall returns on subpoena, Dhan &e. ;

6 same day writ filed.

Apr. 30, 1926. Report to Commissioner of Patents mailed — es

May 1, 1926. Answer filed. 2 |

Oct. 11, 1926. Plaintiff’s seis for bill of . filed.

Oct, 11, 1926. Defendants bill of particulapp filed. (Filed i in

5 No. 589).

Oct, 11, 1926. Defendant’s supplemental bill of particulars 25

bet.

Oct.

eas. filed. (Filed in No. 589).

28, 1926. . Order granting leave. to amend answer; same

5 day amendment filed. .

et, 28, 1926. Depositions of Mrs. A. W. F. Beck, Ralph

yo Hyde, Palmer Hewlett, Leland B. Clark,

G. E. Lamont, Ralph R. Beal, Austin V. Tuel,

James O. Watkins and Harold Lee Rodman

filed on . behalf of defendant. (Filed i in No.

| 589).

Oct. U, 12, 18, 19, 20, 21, 22 25, 26, 27, 28, 29, 1926. Trial before

: : the Court.

Nov. 1, 2, 3, 4, 5, 9, 10, 11, 1926. Trial before the Court.

Nev. 11, 1926. Record of proceedings at trial filed.

Apr. 12, 13, 14, 1927. Hearing on pleadings and proofs. ©

Jan. 3, 1928. Opinion of court filed. N in No. .

4 5 Docket Entries, No. 598

Jan. 16, 1928. Interlocutory decree that. bill of eur he

a ate dismissed as to Patents Nos. 1,244,216 ani

sant _ 1,529,597; that patent No. 1,244,217 is vali

‘ 1 and infritiged ; that injunction issue; ay

ees that costs be reserved for entry of final de.

cree, &; same day decree filled.

J an. 16, 1928. - Injunction issued.

Jan. 23, 1928. Plaintiff ’s petition for appeal, with assignments

ee 3 '. * of error, filed; e day order allowing q

_ peal, bond in thesum of $500; same day

order filed. °

Jai an. 27, 1928. Order approving bond on n appeal i in the sail

: $500. with United States 1 and Guar.

antee Company as surety; same 3 bond

N filed. ae 8 ae

Jan. 27, 1928. Citation issued. 3

es J an. 30, 1928. Citation, with acceptance of service by ool

oa for Getendent-Appelee endorsed no

Feb 5 1928. Marshal returns on Injunction, “Served”, te,

same day writ filed. ‘

Feb. 56 1928. Report to Commissioner of Patents.mailed and

copy filed.

Feb. 17, 1928. Petition of defendant for appeal, with assign

ments of error filed; same day order allo

>. ing appeal, bond in the sum of $500; sam

a day 0 5 er filed. „

4 1928. Order approving bond of defendant on 4

in the sum of $500; with Indemnity Insur-

_ ance Company. of North America as a

Oe same day bond filed.

Mar. 7, 1928. Citation issued. 5 f

Mar. 8, 1928. Stipulation as to transoript of pied ae

same day order approving 1 cere sa

ge tk day order filed.

Mar, 8 1928. Citation, with acceptance of service by coi

3 for plaintiff-appellee endorsed thereon, tet

15 Bill of Complaint, No. 589 ee | 5

35 III OF COMPLAINT. _

oe (Filed January 26, 1926.)

In tHe Unrrep Srarzs District Court,

FOR THE DisTRict or DELAWARE. |

General Electric Company, No. 589.

3 h 81 ‘ * In Egurry.

me DeForest Radio Company. |. No. 1,558,436.

25 the Honorable the Judges of the District Court of

the United States for the District. -of Delaware.

; The plaintiff for its bill of complaint says that it is

informed and believes and therefore avers as stated i in

5 Paragraphs 1 to VII, nip tape as follows:

I. The plaintiff is a ‘corporation’ organized ‘and

a existing under the laws of the State of New York hav- -

“ing a regular and established place of business in

Schenectady, New York, and a citizen of the United-

‘States, and the defendant, The DeForest. Radio Com-

pany io a Corporation duly organized and existing

under the laws. of the State of Delaware, and a citizen,

of the State of Delaware, and said defendant has a

regular and established place of business in the State

of Delaware, within the Distriet of Delaware, within

hich District, as well as elsewhere in the United

States of America, the acts of opine peng herein.

gag complained, of took place.

u. Irving Langmuir, being, within the hae

‘the Statutes of the United States, the first, original

a and sole ester of certain Hlostrical Discharge 4p-

Langmuir Patent,

6 ae = Bill of Complaint, No. 589 ;

paratus nid Process of Preparing and Using the Same,

and being entitled to a-patent therefor under the pro-

visions of said statutes, duly applied to the Commis.

- sioner of Patents of the United States of America for

letters patent for said improvements, which were not

known or used by others in this country before his in-

vention or discovery thereof and not patented-or de-

‘scribed in any printéd publication in this or any for-

eign country before his invention or discovery thereof

or more than two years prior to his said application

for patent, and not in public use or on sale in this

country for more than two years prior to said ap-

plication and not abandoned to the public, and said in-

vention has not been patented in any country foreign

to the United-States of America on an application filed

by said Langmuir or his legal. representatives or as-

signs more than twelve months prior to said application f

for United States patent. The plaintiff, having acquired

by instrument in writing, all the rights to said inven-

5 tion, and all the requirements of the statutes then in

force having been complied with, there were, under

date of October 20, 1925, duly granted to the plaintiff

Letters Patent No. 1,558,436 for said improvements,

whereby there were secured to the plaintiff, its legal

representatives and assigns' for the term of seventeen

years from the said date of October 20, 1925, the exclu-

sive right to make, use and sell said it rovements, as

will appear by said patent or a ce copy thereof

in court to be produced, td of which @rofert ix hr

e i a

III. The im vements forming the . ot said

letters patent are of great value, importance and bene-

fit to the public and to the plaintiff and its licensees;

and the plaintiff has expended large sums of money —

| in _— — — — and pee

Bil of Complaint, 3 599

to the public, and the plaintiff and its licensees have

manufactured and sold and used said improvements

extensively, and are prepared to supply the whole de-

mand which has been ereated therefor; and the plain-

tiff has marked or caused to be marked the radio tubes

made and sold by the plaintiff or under its authority by

imprinting on the inclosures thereof the word ‘‘Pat-

ented together with the day and year said - letters

pret were granted. : =

: IV. Since the . of the 1 patent men-

Stioned the plaintiff has been at all times, and is now,

, posgessed of all the right, title and interest in said im-

provements and letters patent therefor, and entitled to

all the benefits thereof. |

V. Within six years last past prior to the filing of

this Bill of Complaint, the defendant, The DeForest

_ Radio Company, has within the District of Delaware,

and elsewhere in the United States of America made,

uéed and sold or caused to be made, used or sold radio

tubes embodying or containing the improvements de-

scribed and claimed in said Letters Patent 1,558,436,

and has practiced or caused to be practiced the process

of said patent, unlawfully and without license of the

plaintiff and in infringement of said letters patent and

plaintiff’s rights thereunder, and defendant threatens

to continue said infringement, and defendant has

gained great profits from said infringement, wherefore

plaintiff prays that the defendant may be required to

make full 3 of its gains from said = send

f * 75

f VI. But ‘for the l acts of defendant the

_ plaintiff and its licensees and customers would now be

a able to make, use and sell the patented improvements of

Bai | Bil of Complaint, No. 589.

J 2 7 said letters patent with greater profit and ac

= vantage. By such wrongful acts. of defendant the

plaintiff is suffering irreparable „unless this

infringement by defendant is restraine by order of

this Honorable Court, and the e has Ail :

3 remedy at law.

N VII. Plaintiff. hee notified the defendant of w.

ownership of said letters patent and of defendant’s in-

fringement thereof, and has requested the defendant

to desist from. further infringement thereof, but de.

fendant, after such notice has continued ap infringe.

ment. Bi

8 we plaintiff prays:

1. For such preliminary and ee injunction.

against infringement, direct or contributory, of said

letters patent by defendant, its agents, attorneys, work- “|

men and employees and officers and directors, and all

persons in privity with one eee to this n

may seem just;

ges: and l dpe

2. For an ee for

to said infringement, and that defendant be compelled

ie nen me e,,

as the profits; 8 a

3 3, For costs; ae i „

just.

Porest Radio Company; 3 ia :

4. For ‘such other relief as to equity may seem

5 make answer (but. not under oath, an answer under :

5 Bil of Coniplaint No. 589°

: oath being hereby waived) to this Bill of Complaint |

: and to perform and abide by sueh orders and decrees

as to this Court may seem required 12 5 the Keane 5

of equity and good conscience.

GEN ERAL ‘ELECTRIC COMPANY,

By (Sgd.) F. S. Txnnx,

$e Vice-President. —

Attest:

7 _. (Sgd.) SoH eat an

(Seal) ee Pas e eee Secretary.

(Sgd.) ‘Wm. G. Manarry,” me

| Solicitor for the W e

Egquitable Building,

Wilmington, Delawiie.

(Sed. ) Howson and Howson, .

Of Counsel for Plaintiff,

55 Liberty Street,

Ne York City.

Srare oF NEw Yous:

County or New Yous

F. 8. ious being duly sworn deposes end says,

. 8 ä

5 dat he is Vice-President of General Electric Company,

the corporation named as plaintiff in the forégoing Bill

of Complaint subscribed by him; that he has read said

; “ 2 knows the contents thereof; that the same are -

cept as to the matters. e on information

: 1 belief, and as to those matters he believes the com-

85 paint. to be true sat he verily believes, ane Irving

1 fifth day of January, 1926.

. Electric Company, 1

5 Plaintiff,| aurrr No. 589.

ue v. -On Langmuir Pat.

2 DeForest Radio 3 ü No. 3

- Defendant.) .

a mh DzForest RADIO Company, for its answer to

the bi

advised is material or necessary to be answered, says:

* contained in paragraph II of the said bill of com-

copy of Letters Patent No. 1, to plaintiff,

as assignee of Irving Langm

10 f 5 Amended Answer, No. 589.

Langmuir to be the first, original and sole inventor of

the improvements’, set forth in Patent No. 1,558,436..

(Sgd.) F. S. TERRY,

_ Vice-President, .

Subscribed and sworn to beforé me this 1

(Seal) (88d) geen O, Laxblxn, 7

Foto Public. .

N. v. Co. No. 84; N. Y. Co. Rigistar ’s No. 8002.

. (Sommission expires March 30, 1926. 1

25 “ited May 27, 1926. )

—

„ In ong 83 Srarns Disrhror .

von THE Drernror OF Driawann.

— —

of complaint herein, or as much thereof as it is

1. This defendant denies each and every allega-

plaint, except that it has seen Pep to be a

Amended Answer, No. 589 | Les it

2. This defendant Saen each und every allegs- 3

. tion contained in ee III of. the bill of. oom. 3

plaint. 8

3. This defendant denies the e of para-

graph IV of the said bill of complaint.

4. This defendant. denies the allegations of e ‘ ee

‘graph V of the said bill of complaint. ahi

5. This defendant denies the allegations of para-

graph VI of the bill of complaint. *

d. &Purther in answer to said bill of nual. this

defendant upon information and belief avers that the

Langmuir patent is wholly invalid and void and of no

N effect, for. each of the mne reasons 8

(a) Irving Langmuir was not the first 8 of

any substantial or material part of the thing patented, i

but that the same was first in¥énted by others, to wit:

Lee DeForest, of New Vork, N. V., at New York,

N N. V., and Palo Alto, California; a

| Harold D. Arnold, of and at New York, N. fe

and/or others, the names, addresses W of in-

vention this defendant is not at present advised but

begs leave to add hereto when information thereof is

obtained. re; 7

‘ 2. . 4

(b) Because the 8 or ina alleged to be ‘ont :

tented, by the Langmuir patent was known and/or used

by others before the alleged invention or discover

thereof by Langmuir; and/or more than two

prior to the e 2 patent therefor, by!

muir, to wit:

9893

8 12 : saan Amended Aniwer, No. ed |

Lee DeForest, of New York, NN: Xa ‘be New Yor 5

. and/or others, the names, addresses and circumstanées

of such knowledge and/or use this defendant is not at

present advised, but begs leave to add betete when such *

ented by the Langmuir natent were shown in patents

and in printed publications in this country and ooun -

tries foreign to the United States, before the alleged

invention or discovery thereof by Langmuir; and/or

more than two years prior to the filing of the applica -

“tion for the said Langmuir patent, the complete data: ~

as to the names and numbers of said patents, dates of

. . issuance thereof, and the names and dates. of said pub-

‘ begs leave to add hereto wae this information has

said prior art, this defendant is not at present pos-

sessed, but begs leave to add hereto by POEs, amend-

ented had been previously patented to the same party

N. V., and Palo Alto, California; ;

Harold D. Arnold, of and at New York, N. F.

information i is obtained. ‘ 4

105 W the thing or thingy . to. be pat- Be

lications, this defendant is not at present, advised, but

been obtained.

(d) Because the. Larigmuir N is directed to

subject matter not lawfully patentable, which subject 1

matter does not constitute invention in view of the

state of the art prior thereto, full information as to

ment when the same is obtained. oe:

(e) Because the thing or things 50 to. SB pat-

in interest, namely, the General. Electric Company, We

plaintiff herein, in Patent No. 1,203,495, applied for

May 9, 1913, and issued etober 31, 1916, in the name

Paragraph (e) added by amendment October 28, 1926.

ec Were a! ER pet SU on

: ) Amended Anmeer, No, 00 2

„ 0 W. D. Coolidge, assignor, as illustrated, solely as

examples, in claims 1, 13, 16 and 32 of said Coolidge ‘

patent, wherefore, plaintiff made election as to i-

vontorship of the subject matter in suit; is estopped 5

from asserting that Coolidge is not the prior inventor

: thereof; and Patent No. 1,558, 436 is, therefore, void.

“ .-Wumanvonn, this defendant denies that the plain-

tiff is entitled to the relief ‘prayed for or any relief and

therefore prays to be hence dismissed with its proper

costs in this cause sustained hnd with such other and

farther affirmative relief as to the Court may seem just.

DzFOREST RADIO COMPANY,

Piss (Sgd.) Dang & Dansy, 5

| 3 Bai ; Attorneys. for Defendant. .

iy Aap: MB Mi Beet tise Bh shal oh

Solicitor for Defendunt.

4 ) Samvuzn E. Danzx, In., |

6 Sgd.) D G. An g

f 07 Counsel.

2 bote. New Vork, N. L. May 30,3986,

—

er:

14 Defendant 1 Bill of Particulars’ 225

" DEFENDANT'S BILL or PARTIOULARS.

0 Filed Octobtr 11, 1926.)

Ix tee U witep States DisrnIOr Covsr,

FOR THE Disrnrer or DRLAwaR n.

* 7

‘Genera Electric D 1

Plaintiff, . ee

: ft v. 0 3

-The DeForest Radio Company, Hee: SO) Ane 208,

' 7 Defendant. J :

‘Now ComEs Davsixpawz and for its particulars

vane as. pollows: :

. The vatinte and publications which will be of-

tor Qt in evidence at the trial of the cayge,

(a) to illustrate the prior art;

() to support a contention of anticipation; ‘and

are as follows:

Patent Vo. Inventor. --

307,031 T. A. Edison

909,811 . M. Merritt

1,032,914 C. Kruh egy

1,038,910 R. Von Lieben and E. Reiss

879,532 UL. DeForest ;

1,169,082 R. Von Lieben, E. Reisz and 8.

Strayss N

1,028,636 C. T. Thacker 8

1,249,978 G. M. J. MacKay

' 258,966 - E. Weston

411,019 T. A. Edison

1,122,011 ‘Dr. Lillienfeld

1,218,423 Dr. Lillienfeld

oat

Defendant’s Bill of Particulars 8 15 N

8 Ornen Pars .

Patent No. Inventor. /

1,001,105 . Welsbach 2 .

968,407 F. J. Planchon „

829,568 , J. M. Canello

1,205,002 J. T. Marshall

537,693 A. Malignoni

909,811 M. M. Merritt “

596,654 E. F. Dwyer

845,671 P. H. Thomas

859,021 F. Sodd ß . Bee

7 946,068 M. Von Recklinghausen 7 peso

1,203,495: . Coolidge _—- ee

1,083,677 C. A. Friedrich We RS

1,159,307 W. C. White 1 ata

1,250,815 F. M. Dorsey Sey?

552,036 L. K. Bohm R

1,018,502 Just & Hanaman Fa Se „

1,008,896 K. Farkas : ieee

872,936 J. A. Heaney

927,935 W. Von Bolton

1,422,019 J. A. Vunck

1,142,625 — . Reiss

1,246,054 J. H. Clough

„1,121,802 E: L. Clarx

5 1,376,604 N. W. Case

a An article dy Ai Turpin and a book entitled ,

“Les Appiications Practiquzs pes Onpex’s' Exzo-

mans, pages 30 to 31, published in 1902 (Plaintiff’s

Exhibit 62 in Marconi v. Du Fonnsr on: FLEMING Far. a

ENT) ;

LA Tolar ‘Lim Fiuarr.

“mmiques,”” by J. Bovlaxonn and G. Fannie, Seventh Rdi-

tion, 1907, pages 260 to 265 (Plaintiff’s Exhibit 123, No.

6A. M. ROONI v. DeForest on F.Lemine Fan.

. 7 . 1

. . N .

— . ;

s ° —

2 — | i. *

. Laxonum:

ee Defendant’ 8 Bil of. Particulars

71 : 7 * : has ae

—

Apprrion an Berus

5 LuamNrELd, KOSENTHAL! ¢

Fort. aus. den Gebiet der Roentgen Strablen

Bd. 18, 256. “Fer

Rois, Boston, 1903:

Notes on X Lights.

ELSTER & Gxrrxl.: ö N

Wied. Ann., V. 38, 1889, „ * a

| GoLpsTEIN: | aye

5 Wied. Ann., V. 24, 1885, 83. 5

_Pror. ‘Quran:

Phil. Meg., AV, 5. 3058, 1873.

Coolabon:

Phys. Rev., 2, p. pe 1913.

Soppy: —

Phys. Zeit., v. 9, 8 (2908),

LaNncMuIR: * — : op

Phys. Rev., 2, 450, 1913; | Porn Ss

Phys: Zeit., 15, 516, 1914. 5

MBA:

Trans., Varun, Soe. 14, 1 (4019).

Jour. Am. Chem. Soe., 37, 1139 (1915) ;

Jour. Am. Chem. Soc., 38, 2221 (1916).

Warsz:

Trans. Am. LE E., 31, 921 (4912) vw

fiacenov:

Phys. Rev., 13, 415 (1919).

Sxinunn: site

Ann. d. Phys, 50, 769 (1916) ;

F Mag., 12, 481 (1906);

Phys. Rev., 21, 1169 (1905).

‘Hacenow:

| Defendant’ 8 Bill of Particulars i 17

Lxen bm, 5 ö

G. R. Rev., 5 1915 ‘ce

is tt) June, 1920. N 1

July, 1920.

Phys. Rev., 13, 415, 1010.

0 CAMPBELL ee * .

Phil. Mag, 4i, 685 (1921) *

Phil. Mag., 40, 585 11 255 nne

IAxduum:

Prans. A. 1. E. E., 30, 1921 (1913).

Nets e eme b ;

Phys. Rev., 5, 223 (1915) 1 * sai"

Engineering, Jan. 14 ARR N

Proc. Rox Soc.:

3835 K. 219 (1911); N

Zeit. d. Deutsch. Phys. Ges., 13, 271 (1511)

Thys. Rev., 4, 401 (1914) 8.

Jour. Am. Chem. Soc., 35, 931 (h

Suppy & MACKENZIE:

. Proc, Roy. Soe., 80, A, 92 (908).

an eee .

1. 1 TELEGRAPHIE Sams Fi er Les Oxpas, Nano- :

TRIQUES,”” Paris, 1909, Bovuaneer and Fenrir.

2. Proc. Roy. Soc., Feb., 1890, Crookes.

3. Asm, D. Puys, U. Cuem., Bd. XVI, Exsrex &

Garren. Also. ig Aux, 38 p. 27. Also amu

Axx., * p. 166.

. 7 0

4. Fri! a

a. Proc. Roy. Inst., ben. 1800-1802, PP. 84

10 495, a

5 : ; e 3 5 .

; . 9 ,

1 92

. * . *

. 8 9 * tad 0

‘ . .

— , .

ö N it: ——— *

. 0 N 1. „

„ | Defendants Bill of Particulars

b. The Conduetion and Meagurement pf Eleo-

* tric Waves, 1906; .

0. Ionized gas detectors, 1910 ed.;

d. Technies, April, 1905;

ey Prog val Soc, 14. p. 476-487, 1600

5. Bernt

N Foa ALL: E. E., Oct, 1906,

6. ‘Dewar:

\ Nature, July 15, 16750

: -\Charcoal, Vacua; ~*~ ent \"

Proc. Roy. Soc., June, 1904; | at

Proc., Roy. Soe, Dec, 1898.

* 7. Buro nin:

The Wireless Age, Jan, 1014

„ 8. Lawemum: + | : @ |

Proe. I. k. , Sept, 118.

9. Manx Warr: ‘

Edinburgh Philogophica® J Journal, 1828.

10. Wenx RI: a

a. Ann. d. Phys., 14 425 (1904).

11. Mnnrrr & Srxwanr: f

Phys. Rev., Apr. (1904), 239 239.

12. Pur nn

Tue Electrician, Apr. 4 (1885).

In addition to the foregoing, the patents and 2

‘ications förming part of the record of OLD v. Lano-

muir, Interference No. 40,380, of which 2 hc, |

copies,

2. The inistance. or . of prior knowledge

and use defendant will attempt to prove at the trial ot

this cause under paragraph 6 of its answer are:

. \

~ Defendant's Bit of Particulars sid 19

n. D. Anno and Wrermm E o Com-

pany, of and at New York City and e hike wee:

appears in the record of the Arnotp v. Lanomumr: °

Interference above identified. M Hui, Hew-

* Lert, CLARK, LaMost, Beat, TEL, DMAN,. War-

xins and DiForest, as appears in the testimony

täken in San. Francisco, California, in dux,

Evectric COMPANY v. DeForest Rabro, TeLerHone

and TrLTOnAvUN Company and McPursen RAD

ELxOTnO Corporation, in Equity, United States

District Court, Eastern District: of New York,

1723-1724, a copy of which counse} for plaintiff has

in his possession and the taking of which testimony

was attended by counsel for plaintiff.

ov é

3. The instance or - instances of prior | owledge, |

/ invention and use defendant. will attempt to prove at.

che trial, of, this cause under paragraph 8 of the an-

_ swer are ‘those set forth i in paragraphs 1 and 2 of this

bill. of particulars. |

4 *

4. The instance or instances of prior publications

of the alleged invention which defendant will attempt

& prove under paragraph 7 of its answer are. those

det forth in paragraphe 1 and 2 hereof ert .

* N

IRE DeFOREST RADIO br a

By (Sed) Daysy & Dansy,

(Sgd.) E. E. Bent

(Sgd.) Dany & Dansy, -

_ Solicitors for Defendant. |

1 ‘ n * >. : | ”

(Spa.) S. E. Daksy, In., © RY .

0 Counsel. a

„„ plemental Bilt of Particulars, No. 6.

ere " getvibe of a copy of the Within bill of particulars. 10

„ ame wied gd this 2d day of October, „ <.

we 2 8. 0. EDMONDS,

: . Per I. Melasse ee

a, Attorney for Plaintiff. -

—.—

5 | SUPPLEMENTAL prt OF PARTICULARS.

Baan e (Filed October 11, 1926. y 7

3 : 3

* THE Unirep 8 District Court,

FOR THE District OF DELAWARE.

5 * Oy

General Electric Company, 7

e 5 8 N

sae 17 In Equity. §,

SO pee Nos. 589 and 598, .

DeForest Radio wen

: : Defendant. | 25

5 Now Cours r Dine iii supplementing

paragraph 2 of its Bill of Particulars herein states

That, with respect to the prior knowledge and use of

Messrs. Hyde, Hewlett, Clark, Iamonte, Beal, Tuel,

Rodman, Watkins and DeFores that the said prior

knowledge and used Felied upon will be that testified

& to bythe above named persons; that the vacuum tubes

so used were sate tubes so described in the depositions

given by the above named persons; that it is not alleged

that any of said tubes were sold or offered for sale

by Dr. DeForest, otjprethan | to the Federal Telegraph

— Company; that so far as is now enews, none of said -

— 8 8 [, 5 ft ag ;

. * 2 a .

722 9 hs . : tt ; 3

oe . 3 . * 2 0 a : oe

dean 28 — 7 : 5 : nh ¢ 2 5 .

8 oe Fe ve a 6 8 > ; 2 1

a 2 x . - 1 *

<i?

Supplemental Bill of Particulars, V 0. 598 2

Bon ei is now in Sxinttniie, and hat there are no 1

documentary or otherwise, concerning the same, other

than such as was put in evidénce, as exhibitg*or re-

ferred to in the depositions of * Perg named wit-

nesses. : ’

- DeFOREST RADIO COMPANY.

oe By (Sgd. ) Danny & Darsy,.

N Its .

Dated, New York, N. V., October 5, 1926.

. of Complaint, Vo. 50

BILL OF COMPLAINT.

(Filed April 28, 2

In THE Uireap States District Covnr,

FoR THE Disrnlor OF DELAWARE. :

General Electric n bie ts :

1 Pisintiff, NA

252 * eg No. 598.

| ey . In Eaurrx.

DeForest Radio Company,’ a

Defendant. |

To the: Honorable ‘Judges of the United States Dis.

trict Court for the District ‘of Delaware.

GENERAL ELEcTRIC Compaxy;, a corporation organ-

ized and existing under the laws of the State of New

Vork and having its principal office in- the Borough of

Manhattan, City of New York and State of New Vork,

brings this, its bill of complaint, against the De Forest

Radio Company, a corporation organized and existing

- under the laws of the State of Dehware and having a

regular and established place of business within said

State. And thereupon the plaintiff states that it is

-. ‘avers:

advised and therefore upon information and belief ö

Ui That this is a suit in e arising z under

the patent laws of the United States.

a e That on and prior to the fifteenth pike of

July, 1914, Irving ‘Langmuir, of Schenectady, New

Vork, was the original, first and sole inventor of cer-

Bin of Complaint, No: s 23

tain new and useful improvements in Electron Dis-

charge Apparatus and Method of Preparation, not .

known or used by others in this country before his in-

vention or discovery thereof, and not patented or de-

‘scribed in any printed publication in this or any foreign

country before his invention or discovery thereof, or

more than two years prior to his application for letters

patent of the United States hereinafter mentioned, and

‘not in public use or on sale in this country for more

than two years prior tochis said application, and not

abandoned by him prior to his said application, and not’

patented or caused to be patented by him or his legal

representatives or assigns in any foreign country upon

an application filed more than twelve months prior

to the filing of his said application in this country. And

that being such original, first and sole inventor, said

: Langmuir did on the said fifteenth day of July, 1914,

make application in due form of law to the Commis-

sioner of Patents of the United States for letters pat-

ent for such invention and duly swore to the specifica-

tion thereof and requested the Commissioner of Pat-

-ents to issue to him any letters.patent, which might be

granted on his said invention, and then and there in

all respects complied with the necessary conditions and

requirements of the statutes of the United States in

such case made and provided, and duly assigned said

invention and application and the letters patent to be

issued pursuant to said application by proper assign-

„ment in. writing duly executed and delivered to the

plaintiff, General Electrie Company. That thereupon

such proceedings were had with respect to’ the said in-

vention and application that on the twenty-third day

of October, 1917, Letters Patent No.. 1,244,216 were

- duly issued to said plaintiff for said invention and on

said application i in conformity with the requirements

of the statutes in such ease made and provided. And

the plaints, brings here into court a duly authenticated :

Me Bill of Complainit, No. 696

copy of po letters patent and prays that the same |

may be taken as part of this bin. ! bi.

Third. That on and prior to the twenty- sigue ö

day of October, 1915, Irving Langmuir, of Schenectady,

New Vork, was the original, first and sole inventor of

certain new and useful improvements in Electron Dis:

charge Apparatus and Method of Operating the Same,

not known or used by others in this country before his

invention or discovery thereof, and not patented or de-

seribed in any printed publication in this or any for. ;

eign country before his invention or discovery thereof,

or more than two years prior to his application for let-

ters patent of the United States hereinafter mentioned

and not in public use or on sale in this country for

more than two years prior to his said application, and

not abandoned by him prior to his said application, and

not patented or. caused to be patented by him or his

legal representatives or assigns in any foreign coun-

‘try upon an application filed more-than twelve months :

— prior to the filing of his said application in this coun- 4

try. And that being such original, first and sole

inventor, said Langmuir did on the said twenty-eighth

day of October, 1915, make application in due form of-

law. to the Commissioner of Patents of the United

States for letters patent for such invention and duly

__ swore. to the specification thereof and requested the

„Commissioner of Patents to issue to him any. letters

patent which might be granted on his said invention,

and then and there in all respects complied with the

necessary conditions and requirements of ‘the statutes -

of the United States in such case made and provided,

and duly assigned said invention and application and

the letters patent to be issued pursuant to said appli-

cation by proper assignment in writing duly executed

and delivered to the plaintiff, General Electric Com-

pany. That thereupon such proceedings were had with’

" &

Bill of Complaint, No, . 3 5 25 5

dee to the said invention and application that on.

the twenty-third day of October, 1917, Letters Patent

No. 1,244;217 were duly issued to said plaintiff for said

invention and on said application i in conformity with

te requirements of the statutes in such case made and

provided. And the plaintiff brings here into cohrt a

3 duly authenticated copy of said letters patent and

prays that the same may be erer as part of this bill.

Fourth. —That on and, prior to the eleventh day of

Augusty 1921; Irving Langmuir, of Schenectady, New

York, was the original, first and sole inventor of cer-

tain new and useful improvements in Electron Emitting —

Device and Method of Preparation, not known or u@d

by others in this country before his invention or dis-

. covery thereof, and not patented or described.in any

printed publication in this or any foreign country be-

fore his invention or r discovery thereof, ¢ or more than

years prior to his application for letters patent of

the United States hereinafter mentioned, and not in

public use or on sale in this country for more than two

years prior to his said application, and not abandoned

by him prior to his said application, and not patented _

or caused to be patented by him or his legal represen- :

tatives or assigns in any foreign country upon an ap-

- plication filed more than twelve months prior to the

filing of his said application in this country. And that

being such original, first and sole inventor, said Lang-

muir did on the said eleventh day of August, 1921,

make application in dué form of law to the Commis-

~- sioner of Patents of the United States for letters pat- :

ent for such invention and duly swore to the specifica-

tion thereof and requested the Commissioner of Patents

to issue to him any letters patent which might be

granted on his said invention, and then and there in all

‘respects complied with the necessary conditions and re-

2 eee of the statutes of the United States i in such

5 5 8

‘ 4 -~ ° «

. * .

1 5 : x —

‘ 8

— 4 - * .-

: . —

. 2

~—_

. vf : . 5 : j . : 7 * .

26 i Bill of Complaint, No, 598

case made and provided, and duly assigned said 1

vention and application and the letters patent to bs

issued pursuant to said application by proper assign.

ment in writing duly executed and delivered to the

plaintiff, General Electrie Company. That thereupon

such proceedings were had with respect to the said

invention and application that on the tenth day of

March, 1925, Letters Patent No. 1,529,597. were duly

issued to said plaintiff for said invention and on gad

application in conformity with the requirements of the:

statutes in such case made and provided. And the

plaintiff brings here into court a duly authenticated

copy of said letters patent and prays that the same may

be taken as part of this bill.

Eirtu That by virtue of the said several assign-

ments and of the grant of the said several letters pat-

ent, as above set forth, the plaintiff became. on the date

of grant of each of said several letters patent and that

it has ever since been and now is possessed of and

vested with the full and entire right, title and interest

in and to each of said several inventions and letters

Wen | :

Sivth That the said defendant, the De Forest

Radio Company, has been, since the grant of said let-

this bill of complaint, at Wilmington, Delaware, and

elsewhere within the United States, and still is without

license or permission of the plaintiff and in infringe-

ment of said letters patent practicing and causing to

be practiced the inventions in said several letters pat-

ent, and each and every thereof, set forth and claimed,

and has been and still is making, using and selling or

causing to be made, used and sold electron discharge

apparatus prepared, employing, containing and oper.

. in accordance with the inventions i in said several,

Bill of Complaint, No. we 27

letters . set forth and claimed, all to the ene :

great damage. l J

, ent- That the said defendans hee en daly

notified of said letters patent and of its infringement

thereof 1 in violation of the plaintiſt s rights thereunder. a

ihth. —That the said defendant is prepared aud

ready to continue said infringement, and unless re-

irreparable damage from such unlawful acts of said.

defendant, and that said defendant has derived and

received and still is deriving and receiving from said

ifring! acts great gain and profits.

: W plaintiff prays that an 8 be

taken of the profits received by said defendant and the

damages suffered by the plaintiff in the premises; that

said defendant and its officers, servants, agents em-

ployees, workmen and confederatés may be.perpetually

restrained and enjoined by the decree and injunction —

of this Court from lirectly or indirectly infringing

upon plaintiff’s said @gveral letters patent or any there-

of; that said defendant may bé decreed to pay the costs

of thie suit and may. also be enjoined and restrained

as aforesaid during the pendency of this suit; and that

the plaintiff may have such other and further relief as

to this Honorable Gourt may seem meet.

GEN ERAL ELECTRIC COMPAN 1

By (Sad. ): Francis C. Pratt,

e il 3 eee

(Sgd.) Sanuk. Owen Epmonps,. :

(Sgd.) Wu. G. Manarry, ee

Solicitors for Plaintiff.

(Sgd.) Samvugn Owen Epmonps, | | :

Py Counsel for Plaintiff. ä 5 .

strained therefrom the plaintiff will suffer great and ais

28 Bill of Complaint, No. 598

Sraze or New York, . *

Couyty OF Scuenzctapy, abe

Fa C. Pnarr, being duly sworn, eee and

says that he is a Vice-President of General Electric

Company, the plaintiff nained in the foregging bill of

complaint; that he has read said bill of complaint and

knows the contents thereof; that the same is true of his

own knowledge save in so far as the same is@herein

stated to be upon information and belief, and as to

those parts he believes it to be true. And he does fur!

ther depose and say that he verily believes said Irving

Langmuir to have been the first, original and -sole in-

ventor of the several inventions in said Letters Patent

Nos. 1,244,216, 1,244,217 and 1, 529, 597 set forth.

Gd FRANCIS O. PRATT.

- @pbecritied and sworn to before mie, this twenty. .

third day of April, 1926. * a

“Bed ) Haun Onrorp,

_ Amended Answer, No. 598. 29

|, AMENDED ANSWER.

0 Filed May 1, 1926.7)

‘Ts THE Usrren Status’ Dieta Counr,

von THE Disrnior or DELAWARE,

General Electric te n 7]

| 105

The DeForest Radio den ; * ain

Seely. Defendant. j

| The answer of the DeForest. 14050 Company, de-

fendant herein to the bill of complaint of the Gzwerar ae 5

_ Eugcrrre Company. ‘The defendant, answering, ays:

This defendant denies each and every idlogs: :

tion contained in paragraph ‘‘Second’’ of the bill of -

2 complaint except that it admits having seen what pur-

ports to be a copy of Letters Patent No. 1,244,216,

dated the twenty-third ay of October, 1917. ;

2. This defendant h each · and every 1 8

tion contained in paragraph Third“ of the bill of

complaint except that it admits having seen what pur-

ports to be a copy of Letters Patent No. 1,244, 217,

dated the twenty-third day of October, 1917.

3. This defendant denies . and every ise

tion contained in paragraph „Fourth“ of said com-

plaint, except that it admits having seen what purports

to be a copy of Letters Patent No. 1 529, 5597, dated =

tent day of March, 1925.

ee 4 This defendant ne no peace of the matters

det forth in paragraph Fifth“ of the said bill of com-

Amendment to answer filed October 28, 1926.

discovery thereof or more than two ye

Se Andes Ae No, 598 *

plaint, and therefore denies the same, and puts plain

tiff to its proof.

5. This defendant denies Cis: and every allega-

tion contained in paragraphs Sixth, Seventh,“

and Eighth' of the bill of complaint.

This defendant further answering the said bill of

complaint avers contrary to the. allegations therein.

contained. es

— 6. That the said 1 Langmuir, was not the

first inventor of or discoverer of any mater

stantial part of the thing patented, but that

was known to and used in this country by others than

r sub-

or to his

application fer the respective Letters Patent of the

Langmuir, before his alleged ro rng or.

- United States therefor, as follows:

Lee ‘DeForest, of and at Palo Alto, California;

G. E. Lamonte of and at- San e Cali-.

hoo fornia. :

7. That the said patentee, Langmuir was not the

original or first-inventor-or discoverer of any material

or substantial part of the respective thing alleged

to be patented, hut that the same had been ‘patented

and described in printed publications in this and for-

eign countries before his alleged invention or discov-

ery thereof, or more than two years prior to his appl®

cation, of which full information of the patents and

publications defendant is not. at present possessed, but

begs leave to add-hereto by Peeper amendment.

8. That the things claimed or Sucht to be dals ;

in the respective Langmuir patents do not constitute

lawful subject matter for a patent; that the things pat.

ented were not lawfully patentable in view of the prior

same

‘oO

Amended Answer, Wo. 598. 31

att/ and in ae of what was 8 dommonly known to those |

skilled in the art, and in view of the prior inven on,

knowl ‘and use in this country, full information of

which defendant is not at present possessed, but begs

leave to add hereto by proper amendment.

9. That the things ‘claimed or b to be elsimed

in the said Langmuir patents do not constitute patent-

able invention. requiring reward by way of a grant of

letters patent within the meaning and intent of the

United States. Patent Statutes.

| 10. The things claimed or ‘sought to be clainted i in

the said respeetivs Langmuir patents do not consti-

tute lawful subject matter for a patent in that they

are mere aggregations of unrelated. or |

11. That the things attempted to be patented in

He said respective Langmuir patents have been in use or

on sale for more than two years prior to the respective

applications for letters patent by certain persons, f

firms, <orporations or e inclnding :

5 Western Electric Company of and at New York, : : 3

New Vork.

General Electric Company’ of and at ‘Schenectady,

New York, and divers persons, firms, corpora-

tions or associations, complete information: of

which this. defendant is at present not pos-

sessed, but begs leave to add thereto by.

: proper amendment. :

1944 The thing or things alleged‘ to be patented ee

patents Nos. 1,244,217 and 1,529,597 had been previ-

ously patented to the same party in interest, namely,

the General Electric Company, plaintiff herein, i in bar

n eee amendment Ociber 28, a6. |

Ok:

oe.

* *

E .

5 22 a + mended Answer, No. 598

a No. 1,159 ,307 applied for March 20, 1914, and issued :

Vovember 2, 1915, in the name of William C. White,

assignor, as illustrated, solely as examples, i in claims

4. and 6 of said White patent, wherefore, plaintiff made .

elettion as to inventorship of the subject matter of

Said patents Nos. 1, 244, 217 and 1,529,597; is estopped

from asserting that White is not the frst inventor, ’

thereof; and patents Nos. 1, a and 1,529,597. 1

: therefore, void. TE bs .

ye gS „Wännzronn, this defendant denies ch and every

<a allegation of the bill of complaint, save those admitted

or as to which it states it is-without. knowledge, and

this defendant denies that the plaintiff ig entitled to.

the relief prayed for or to any relief, 20 therefore

„ praps to be henee dismissed with its proper costs of

ative: e relief as to the court may, seem just. 2 f

. DeFOREST RADIO COMPANY.

a By. sat ) Donn & Dansy, 1

8 ay eee 5

(88d. J E. E. BRL. 5

( (Sgd.) Darpy & iol

: Solicitors for Defendant.

„(dd) S. E. Dane i, “ Z

te (Sgd.) Tuémas G. HAlenr, ve

0 Counsel.

) 5355 /Proceedings| . : —

: . In THE Unirep rari Distaicr Covar,

2 rok THE Disrarct OF. DELAWARE. :

* : SEIS ~ -We - . f i 5 5 On Langmuir Patent

3 2 No. 1,558,436.

_ DeForest Radio Company. | No. 1,558,

ats

In n the U. 8. District Court, Wilmington, 1 Delaware

: lende, October 11, 1926, at 10 o’dlock 1. *

- Before:

Hon. Hueu M. Scones :

“a, Distgct Judge.

Appearances : iss e RSV

ee Hunxxr Hobson, Bea. 5

Ee 32 Samuet | Owen Epmonps, Esq., 5

AkExRT G. Davis, Esg., gL

* AuexaNnver D. Lunt, Esa, :

at WIIIIAI G. Mauarry,. Eso,

ae oe Of Counsel for Plaintiff.

e —

& Tzxoxtas 6. Harenr, E sd,

. Samven E. Dansy, In., Esa, 8 Ss

Wit R. BALLARD, Esq, , : a

me ux. A. Ricumonn, Esq., ' 5 TREE. | ay

Wand, Gray & Warp, Esas.,

“a Counsel for Defendant.

Case No. 589 is on one patent.

oo ; ; Proceedings 3

General Electric Company ) In Equity. No. 598,

. os On Langmuir Patents

pg V. : 8

ae 55 Nos. 1, 244, 216, 1, 244.

DeForest Radio Company.] 217, 1,529,597.

— —

i Appen

Husser Howson, Eso, f

Sanur! OwEN ‘aan Esd.,

AlRRRT G. Davis, Esd.,

Avexanner D. Lunt, ESG,

Wuliax G. Manarry, Esdo,

Of Counsel for Plaintiff.

_ Tuomas G: Harour, Ese,

Saul. E. Darsy, In., Esd.,

ew Warp, Gray & Wand, Esgs., ?

8 0 Counsel for Defendant.

PROCEEDINGS.

Mn. Manarry: If the · Court please, there are two

cases set for trial today, General Electric Company

against De Forest Radio Company, Nos. 589 — 598.

Tue Covet: Both against DeForest? )

Mr. Matarry: Both against De Forest Company.

Tun Court: \ at is that potent?

Mn. Manarry: No. 1,558,436. 1

‘Tae Court: And the other?

Mn. Manarry: And the others are No. 1244215 :

and No. 1,244, 217— 5

Tue Court: More than one in 5 sli suit? |

Mn. Manarry: Three patents in the second suit,

and one only in the first.

Plaintif’s Proofs = 35

‘Tae Court: And the second patent, in sites second

suit is what? pe

Mn. Manarry: No. 1,244, 217 and ge a No. 1, 5295

597. I understand it is agreed between all. parties

that the two cases shall be tried together under the. ..

caption of the two cases. ie

Tue Court: It is so ordered.

Mn. Manarry:' If your Honor please, Mr. Albert

G. Davis, Mr. Hubert Howson, Mr. Samuel Owen Ed-

monds are of counsel for the General Electric Com-

c pany, the plaintiff in each of these cases, and Mr. Gray

is not here, and has asked me if I would move the

admission of Judge Haight for the defendant; also

Mr. Darby, Mr. Carl A. Richmond ahd Mr. Ballard. I

believé that is all.

TRE Court: Are counsel the same in ont suit? ,

Mn. Mauarry: In each suit.

at ae ) [Nore: Opening statements not printed.]

——

’ Arter RRCESS.

'PLAINTIFF’S PROOFS.

Mn. 5 The plaintiff « offers in evidence offi-

cially printed copy of the Patent No. 1, 558, 436, dated

October 20; 1925, issued to the plaintiff as assignee of

Irving Langmuir for electricale discharge apparatus ö

and process of preparing and using the same.

(Received in evidence and marked „Plain

_tiff’s Exhibit No. 1.’’ See Volume IV, Plaintiff 's :

. Exhibits, page 1.) |

Mn. Howson: Plaintiff also teres in evidence off .

cially printed copy of Patent No. 1,244,216, dated Oc- -

tober 23, 1917, issued to the plaintiff as assignee of

Irving Langmuir for electron eevee 3

and method of preperation. : :

ents just offered in evidence.

28 Plant, s Proofs =. —s

: (Received in evidence and marked Plain.

tiff’s Exhibit No. 2.“ See Volume IV, Fan

E Eahibits, page 11.

Mn. Howson: Plaintiff also offers in evidence 7 |

éially printed copy of Patent No. 1,244,217, dated Octo---

Irving Langmuir fo on discharge apparatus and

e operating the same.

spit (Received in evidence and marked “Plain.

tiff’s Exhibit No. 3. See Volume IV, Plointif's

Exhibits; page 16.

: Mn. Howson: Plaintiff also offers in a of.

ficially printed copy of Patent No. 1, 529,597, dated

March 10, 1925, granted to the plaintiff as ie

of Irving Langmuir for electron emitting . device and

method of preparation.

(Received: in evidenee and malted ‘<Plain-

titk's Exhibit No. 4.“ See Volume I V, 1 =

Echibits, page 20.) |

Mr. Howson: I ask the reporter to iia upon the

record this stipulation of September 21, 1926, entitled

in both of these cases, which, with your Honor’s per-

mission, will be tried together, under these four bar..

(The said stipulation | is as follows : 0

4 5 115 SrULATIoR

It the been agreed by a that these f

tp causes may be tried together, the Court con-

. senting, it is stipulated and agreed by and be.

tween counsel for the respective. parties in these

oom, but.for the reer of these cases only, n :

ollows:

1. That printed or e copies 1

patents and publications may be offered in evi-

nce and used with the same force and effect as

certified copies, subject to correction, if error

shall appear, and say dates of silted appestne 7 on

Plaintif's Proote a nee | 37

patents and ‘dates and places of 8 ap-

pearing upon publications so offered may be taken

as prima facie correct, but subject to correction. ye

2. The incorporation of plaintit® und -defend- Ais

ants as ‘pleaded in the bill may be taken as proved.

: 3. Defendant admits that since tue grant of

the Langmuir patent in suit No. 1,558,436, and

rior to the filing of the Bill of Complaint herein

4 it manufactured and sold within the United States.

of America vacuum tubes the same in all. substan-

tial respects. of construction, combination mate-

rial and operation as the tubes accompan this

28 and which are severally marked Plain-

's Exhibits 5, 6, 7 and 8, Defendant's Tubes,

1 Exhibit 5, being what is commercially known as

_ DeForest Type H Rectifier, and ‘Exhibit 6 what |

is known as DeForest Type H Audion, while Ex-

hibits 7 and 8 are what are known as DeForest

. DV5 vacuum tubes. And defendant admits that

these several tubes Exhibits 5, 6, 7 and 8 are de-

fendant’ 8 manufacture.

4. Defendant admits that since the grant of:

the Langmuir patent No. 1,558,436, in suit, and

prior to the filing of the Bill of Coniplai t. in suit

No. 589, defendant issued and publish khe cir-

cular letter and leaflet of which copies accompany |

this stipulation marked Plaintiff’s Exhibits 9 and

10, respectively, Defendant’ s Circular Letter and :

5 Defendant 's Leaflet. aa 2

38. Defendant Aae t it in at least some of

the ‘D V’ vacuum tubes ich it manufactured

and sold within the. United 8 of America

since the grant of said atent No.

1,558,436 and prior to the filing of the! U of Com-

plaint i in case No. 589 9 is, Sen ’s tubes

commercially identified by the Letters ‘DV’ with

the number ‘2’, ‘3’ or ‘5’ as the case ht be,

and of which the above: mentioned Plaintiff's Ex. |

hibits 7 and 8 are typical examples), defendant .

oy. * ‘filament wires of N e ap-

888 8 ae ely be ;

a proximately one-half of ‘one. per cent. of W

that the spoof of filament wire accompanying this

stipulation and identified by the date ‘10/6/24’ —

the initials of S. O. Edmonds and S. E. Darby,

covusel for plaintiff and defendant respectively,

is a sample of such filament wire, the same havi

been procured by defendant from P. R. Mallory

and Company, Inc., of Portchester, New. Tork,

and that defendant used i in others of its said DV

vacuum tubes wire not procured fr 1 sdid P. R.

Mallory & Company, Inc., but which wire was sub-

procured ‘the same in all respects as said wire

rocured from said P. R. Mallory & Company,

: and that the coating on the inside of the

— bulbs of its said DV vacuum tubes of Which

plaintiff’s said Exhibits 7 and 8 are examples, is

magnesium deposited by vaporization: in the

course of manufacture of the tubes. n

6. Iti ig further stipulated that plaintiff may

offer in evidence i in this case the testimony of D.

— KRuotolo given in the suit of General Electric Com-

_ v. DeForest Radio Company et al., in Equity

561, in this court appearing on pages 32 to

60 of plaint tiff’s record.in said suit, and such offer -

shall ith the same force and effect as if said

- witness had been duly sworn and examined i in.

this case. |

1 Sed.) Howson anD ‘Boweds)

Of Counsel for Plaintiff.

.(Sgd.) Samven E. Darsy, In.,

3 Of, Counsel (9 Defendant .

Bet. 21, 1926,

a Howson: We charge it ic of all the

claims of the first of these patents, No: 1,538,436, but.

we particularly call your Honor's attention to the fol-

, e eee,

ered? Nos. 1, 2, 4, 6, 7, 9, 11, 20, 21 dnd 22.

9k the second patent No. 1,244,216, we charge in-

e of all the n N claims 8 end 7 0 ö

John F. E. Hogon 555

Of the third patent No. 1,244,217, we ‘aes in-

fringement of claims 1 and 4.

Of the fourth patent No. 1,529 597, we ane in-

fringement of claims 12, 13, 18, 19, 21 and 22.

I understand that the defendant admits infringe-

ment of all the claims of the patents charged and re-

_ serves the 1 5 to contend that as to Mada

things .

5 Mn. Durs As to the first Patent we ‘admit inv :

fringement of all the claims as charged. As to the

_ second patent we admit infringement of the terms of

the claims. In the third patent the same is true. As

to the fourth patent we admit wenn of the

claims.

Tue Court: All of said conditions are , reserved

so far as the validity is concerned.

Mn. Dansy: Absolutely. I admit notice of in-

fringement of the first patent No. 1,558,436, on Janu-

- ary 26, 1926. We acknowledge notice of the infringe-

— — |

ment of the other three e prior to this t i

Delaware.

“sl JOHN v. L. HOGAN.

a Joun V. 1. Hoax, called as a witness on behalf

of the plaintiffs, being: duly sworn, testified as fol-

lows : . |

Dinner Examination.

By Mr. Howson: ,

2. 1. Please state your occupation, Your age, and

your residence.

A. Tama consulting engineer, age thirty-six, resi-

_ dence, Forest Hills, Long Island.

Q. 2. You may state your familiarity with the g

radio art in a general way.— ERE, :

| Inet enter wee Reward, men

‘Jann V. L. Hogan

Mr. Danzer: We will admit Mr. Hogan’ s quali.

_ fications as a patent expert and as an expert 1

radio matters. Mr. Hogan has prepared a type.

written statement of. his qualifications and what

not, and I rather take the position that as long a

_ we admit it it is ndt necessary. 5

TR Court: It is no longer in issue, I take

it, poe the qualifications ‘become essential and

then it may be spread dan the record. f

By Mr. Howson: *

Q. 3-4. Mr. Hogan, nie you ‘studied and: do you

understand the several patents in suit which have been

offered in evidence referred to colloquially as 1, 2, 3

and 47 |

A. Yes, I have studied all of the pores and I

believe I understand them. )

Q. 5. As a preliminary to the éoriaddeétion® of

those patents, will you tell us something of the elemen-

tary facts about the construction and operation of

radio tubes generally and their purposes and use?

A. Yes. The vacuum tube that has become 80

a prominent in radio and in a number of other arts is

mechanically a very simple thing: When we look at

it we see nothing but a glass tube and the electrodes

within that tube and electrical connections from the

electrodes to the outside. |

There may be two electrodes or there may be

gree electrodes or in some special cases there may

more, but in any event, the structure i is extremely

simple.

When we take up the 5 ‘of the tubes and .

consider the electrical: matters involved, and particu-

larly the electro. physical matters involved we find that

the whole séries of effects is exceedingly 201 mplex, 80

much so in fact that the vacuum tube in ite various

fi foruet hes ‘hows She, pulijent ee eee study -

es ee Seeks 2 a

, \

“John v. L. Hogan oe a

phe first practical radio tube was the Fleming

valve. Before it was applied to radio it was old as a

4 rectifier, that is to say, as a device which can be used

for converting alternating current to direct: current at

low frequencies.

It was never pred used as such a power

- rectifier so far as I have been able to find, although it

had laboratory uses: for that purpose, and the reason

that it obtained no practical work-a-day uses was that

it was. incapable of handling the amounts of power that

are common in the ordinary electrical industrial arts.,

That limitation did not work against the tube as a2

radio detector, however, and go when Fleming ree-

ognized the radio use of the tube about 1904, and com-

menced to introdueé it into the rädio field, it did

utility, for that purpose. The imme-

ion of the radio waves is of. course a type

- of operation that involves extremely minute ee, ay

voltages and amounts of power.

If I may refer to this Fig. 1, which is a gtaphicel

illustration of the Fleming valve or of a two-electrode:

tube generally, perhaps I can make a brief description

of the device a little clearer. yy

Ihe rectangular vessel shown is usual a cylin-

drical glass bulb, that is to say, the vessel indicated

by the rectangular form of line on the drawing i is us-

ually a cylindrical bulb such as that which is used in

the ordinary are light. It is seen that on the left

of this diagram, in hairpin shape, is a filamentary elec-

trode marked a, and at the right within the bulb is

shown an anode or-plate electrode marked b. ie

The filament is the cathode in devices of this type

and is sho in this illustration as connected into the

_ Girenit,of à battery marked e, which battery supplies

current for the heating of the filament, usually to a

Point of substantial or bright incandescence. _

1 88 anode or plate b may liens take a a number

eo “

— 5 5.

. John . L. Hos

of different forms in practical devices. It may bes

small piece of metal in flat plate-like shape; it may he

a cylinder of sheet metal surrounding the cathode a,

or it may be a wire electrode either in filamentary

hairpin shape or strung back and forth over its sup.

ports-all three of those structures and some ‘varia-.

tions of them have been used. 7

Edison discovered some time in the 1880 ˙6 that in

ss an electric incandescent lamp a cükrent could be meas-

ured flowing between the. incandescent filament itself

i and an additional pole or plate-like electrode which he

inserted into the tube especially for the study of that

particular effect. As a result of that discovery and

his announcement of it, and also of his proposal to use

a tube sd constructed as a voltage regulator or indi-

eator, the current passing through a tube evacuated

of its original content of atmospheric air, for instance,

has come to be known as the Ediso of e an

Edison recognized that the cur?€nt flowed only in

one direction, but so far as I know. made no applica-

tion of that observation to the rectification of alter-

nating currents and certainly made no application of

the effect in radio use as did Fleming. There was no

radio at the time of Edison’s experiment.

In this tube we now know that the heated filament

a gives off electrons, that these electrons are elemen-

tary negative electrical charges, they are looked upon

as so-called atoms of negative electricity, and we know

that when a circuit is completed between the anode ot

such a twö-electrode tube such as shown in Fig. 1 and

the cathode, as for instance by connecting a wire from

the terminal of b through a second battery back to

the filament circuit, we know that the electrons may

flow ‘from the filament across the space and back 3

through that circuit and battery to the filaments 80

completing an anode or plate cireuit for the device.

We also know sal the negative current will flow :

John V. 5 Hogan 5 43

„ ?

most easily, the flow off electrons will flow n dasily

. frém the cathode to the anode within the tube or out-

ide of, the tube from the anode to the cathode.

that reason when a battery is put in‘a/plate circuit

Ror

produce a flow of electrons through the tube, that is to ;

say, to pump electrons through the tube by reason. of .

the battery’s electromotive force, the positive terminal

of the battery is connected to the anode b, and the

negative terminal to the filament a, so that the nega-

tive potential of the battery will repel the negative

electrons through and out of the filament to late

whence they will return to the battery : the

wire circuit. i iP :

It might interest your Hines for me to note at the

moment that the currents in terms of industrial cur-

rents are small. We customarily speak of the currents

in these tubes as measured in microamperes which are

millionths of one ampere or milliamperes which . are

thousandths of oné ampere, and while ‘those currents

are small compared to industrial currents they are

large compared to the current ne, by a flow

ol a few electrons.

For example, to get an electric rr of one

b> ian, that is to say, one millionth of one am-

pere, we have-to have about. six million million élec-

_ trons passing through the fircuit per second.

Fleming found in applying this tube to radio that

the i impressing of a radio frequency electromotive |

tee, such as is developed in the receiving circuit of

a radio receiver, upon the two electrodes of his tube

would give a partial rectificatién of the resulting alter-

nating current. He found that there would result, in

- other words; a current which flowed to a larger extent.

in the normal direction of high conductivity through

the tube than in the other Girection.” 5

He was able to use that rectified or converted all:

ee, current to operate an indicator such as a

3 * 4 ‘

: 4 ‘ : .

. which could not bd operated 0 by

the radio frequency currents which the arriving wayes

4 me = Jotn V. L. Hagan

could set up of their own force. ;

The next important practical step in the develop.

ment of the vacuum tube in. radio Was DeForest ’s addi-

tion of the third electrode or grid. A tube of this sort

is shown in Fig. 2 Where it will be recognized that the

ment battery c, as well as the representation of thé

tube nnn 1, which I have just, |

discussed. „

In addition to thöse elements, Fig. 2 shows the grid

or sereen- like third electrode d interposed in the space

between the cathode a and the anode b. The diagram

also shows the completed anode circuit from b to the

filament by way of a telephone indicator f and a plate

or anode battery. e, thus returning to the fllament.

Wires g and h are also shown connected, to the |

grid d and to the filament.

The flow, of electrons from the filament to the ;

plate i is the same, speaking generally, in this type pf

tube as in the two-electrode tube, but that current

through the space can be affected us to its amount

the potential, the electric Voltage, to which the grid

is charged at any particular instant.

It was found. that for some purposes it was more

to apply this input er driving vol to the

grid than to the filament, that is to say, to develop 7

that potential een the points g and h, than to ap-

ph it directly. to e plate and filament as would be

. _ < done in the case of the Fleming valve. : :

The uae of the third e aa 4 terminal of the

input circuit in that way in general gi a larger con

than ould be hud from the same potential ppl

directly to that circuit and~consequently the three?

electrode tube within ite’ en ‘whatever *

John P. L. Hogan V

en be for the particular Ste 3 is “bebe

ter suited as a radio detector than the Fleming valve

3 en tube: It is also useful as an ampli-

fler.

There are a number of Wine de that 4 to

both the two and the three- electrode tubes. For in-

stance, in the matter of the filament. Here we have

a simple conductor having connected to its terminals a

battery. That battery is capable of applying a cer-

tain electric voltage to the terminals of the fllament

N and consequently is capable of foreing a certain defi-

nite electric current through the filament. -

The voltage across the filament terminals multi as

plied by the current which that resylts in; passing.

through the filament, gives a measure of the power

consumed in the filament, and if the pressure is meas-

ured in volts and the eurrent in amperes the product.

gives the power in watts; so that one may determine

the power consumption of the filamént of such a tube,

whether of the two-electrode or three-cleetrode type,

in that simple way.

A watt, as your Honor doubtless Sani is an

electrical unit of power and is rather small from the

industrial viewpoint, because it is about 1/750 of a

horsepower. N

The voltage applied to the tube and e ne

Dat results also give a measure of the filament re-

distance, and when I say applied to the tube, in this

case, I mean to the filament terminals. The resistance

! of the filament under any particular condition is de-

_ termined then by dividing’ the voltage or the potential

in volts by the resulting current in amperes, which

‘will give us the resistance of the filament in ohms. In

that way we can determine the filament resistance |

for any particular condftion. _

As a matter of fog, the Semen In the armel ube

‘sein the usual electric Jam a has 5 Steen —

3 pe

in any of these devices as measured by the voltage

buy the user and thus the temperature of the filament

eS. c J ohn V. L. H ogan

resistance when heated than when it is cold; and the :

ratio of the two resistances, that is to say, the resis

ance with operating current at a high current flowing

and the resistance with the perhaps smallest measure.

able current flowing, or at least a small current flow-

ing, gives an indication of the material* of the filament

which is sometimes very useful. |

That relation connects up the temperature of the

filament with the voltage applied to it and it is entirely’

feasible to determine the temperature of the filament

applied to it. „The relation is usually a simple and -

continuous one ‘and depends simply on the fact that as

the voltage is increased more current is forced through

the filament and therefore more energy is expended

in the filament and therefore the filament becomes hot:

ter as the temperature is higher. 5

Wo can tell what the temperature of any cali

brated or measured filament is simply by measuring

the voltage across its terminals. It has been custor-

ary in the use of vacuum tubes to provide a regulating

resistance in series with the filament battery, so that

the voltage applied to the filament could be controlled

changed. N

: Further, Lith relation’ to both the two oni three-

eleetrode tubes, it is recognized that the higher the

temperature of the filament the more easily electrons

break through the surface, so to speak, or, putting it

more directly, the more rapid will be the emission

of electron current for practical purposes.

There is some difference between metals und 5

some cases an astonishing difference between the ae!

‘sible emission ai a certain temperature. 8

. If in either of these tubes, that of Fig. 1 or of Fig

en Pn ae el See

: „

John v. L. Hogan 5

2 there is a abe e igh potential applied to the

anode b, so that its positive charge will draw over

through the vacuum tube all of the electrons that are. 8

emitted by the filament, then by measuring the cur-

rent flowing through the anode circuit, one can deter-

mine what is called the saturation emission of the .

fllament at that particular temperature. a

The filament at a certain temperature can b f

a certain number of electrons per second. If all of

ee electrons are forced to pass through the circuit,

then a measurement of the corresponding current flow

is of course a measurement of the total or saturation.

~ emission of that particular filament at that particular

temperature. :

If under this same saturation condition, that is,

with sufficient voltage to draw all of the electrons

through the circuit, one increases the temperature of

the filament, then of course a new value for saturation

is obtained because at the higher temperaturggthe. fila-

ment is able to emit more electrons per secohd and a

larger current flows which establishes a new value

for the saturation current. It is a definite value for a

given material at a given temperature, although many

times the measurement of the saturation is difficult be-

cause of complications brought in by other effects.

If we are given in a vacuum tube of. this sort,

either the two or .three-electrode type, a reasonable

supply of electrons, more electrons than we need. to

carry the current that we propose to use, we cah then d

study how the plate current, the current through the

plate circuit or anode circuit, varies as the potential

applied to the anode is changed. Of course, if there

were not enough electrons we could not make that

study because as soon as the plate potential would

reach a value that would pull all of.the electrons away

from the cathode, we would at once be limited by a

lack * electrons.

8 Ju v. L. Hagan

N But assuming that there are enough el rom

available, that is to say, that the filament is operates

at a sufficiently high temperature, and that the pro

portions of the tube are right, we may vary the *

age of the plate measured with respect to the filament

‘and then as a result of each voltage we may measure :

the current flowing through the plate Lin, W

will be, of course, the electron current. 4

That is entirely different from the temperature

5 relation of which I have spoken a moment ago. In the

other case we are measuring the plate current as it

changes when the filament temperature is varied, but

for a given plate potential which is high enough to

draw all of the electrons away from the filament. In. §

this instance we are supplying instead of a surplus

plate potential, so to speak, we are supplying a surplus -

temperature (more than enough electrons ), and ve

are finding out how the electron current or the current

through the circuit varies as we ‘change the plate po-

tential.

In general, tus plate . in the old tubes will

increase uniformly as the plate voltage is inereased

up to a value of about twenty or twenty-five volts,

Then the potential applied to the plate will ordinarily

result in drawing over the electrons with. sufficient.

velocity to produce ionization of the residual o

within the ev tube. ia,

That ionization is a conduction effect that is pro.

. duced in a gas when electrons are passing through the -.

gas with a high enough speed or velocity, and conse

quently a high enough energy; so that when they ol.

de with gas molecules, they will disrupt the -mole-

. gules by knocking out electrons already. forming part

of the molecules, and thus give the molecules which

have suffered from the collision, the opportur

| mae say, to display a — 11

5 *

oo “John V. L Hagan a

| The . or the ende is 3 on as a tiny

solar system having a positive nucleus at the center,

like a sun, or two suns, in the case of the molecule and

circling around those, a group—not always a group

but one or more electrons, which take the ‘place of

planets in our solar system. |

Phe positive charge of a nucleus, the sun at the

enter, is balanced. by the negative charges of the elec-

trons in the neutral molecule, and it exhibits no elec-

trical effects, though it floats. around in the space

within: the tube.

When one of. the electrons is . oe by col-.

aie with a fast-flyinig electron from the filament,

then the positive charge at tne center, the positive sun -

. predominates, and the entire molecule exhibits a unit

positive charge.

It is that development of. an slostzical effect that

is called ‘‘ionization,’’ and it is that which may hap-

pen when an electron passing through a partially

_ evacuated space attains a velocity corresponding to ;

that which could be given to it by the effect of a volt-

age of ine order of twenty or twenty-five volts. |

Of course, in the case of simple ionization, where

we had a neutral: molecule and a flying electron, after _

the collision we have two electrons and a ee

charged ion.

The effect of e may be 10 increase the -

conductivity of the gaseous space, and that increased

conductivity will ordinarily be shown up when we in-

erease the plate potential, the filament to plate battery

voltage, by an excessively rapid increase in the rate

of current flow; that is to say, as we go from five volts -

to twenty-five volts, or thereabouts, we get a more or

less uniform and gradual increase of plate current ;

but from the voltages of that order on up, if there is

ein, the: current will i increase far more rad,

pis . 1 4

“3 wee @ . : *

80 „

50 Ge | . v n-

and the dings of rate will be evident asa gener 4

rule. 7 7 |

If the ionization produced by the rapid driving |

of the electrons through the space, is very large, i

very intense, that is to say, if the space current js _

fairly high, and if the voltage is sufficiently high, the

‘ionization may attain so large an amount that it can

actually be seen, or its effect can actually be seen asa

blue glow within the vacum tube. You can not see

_ -jonization within a tube; no visible effect is produced

by the ionization of the residual gas, until that ion. ©

ization occurs at a rapid rate, a very intense rate. In

fact, in the case of the. practical audion tubes at 30

high a. rate that the tube is tremendously oceania

and far beyond its point of normal use. :

The two-electrode tubes, as I think I said, hare

been used Practically, and to a substantially practical

extent, as radio detectors. They have also been used

by the power rectifiers, and within recent years the

use of the two-electrode tube as a power rectifier; that

is to say, as an industrial or practical converter of

alternating current to direct current, has been. very

extensive.

8 The ee nlsstrocde tubes have been used largely

as radio detectors, as amplifiers, both of telephone and

radio currents, and as generators of alternating cur-

rent for sending messages, particularly in connection

with radio transmitting stations, and in carrier current

telegraphy or telephony on wires, which has sometimes

been called wired. wireless.

There are also special uses of these vacuum tab 5

Such as the limitation of power in protective devices,

or regulating devices, and also very extensively the

production of X-rays. :

MX. Howson : I will offer in evidence at this

point the tubes and other articles that are referred

to in the stipulation, which I ask to be spread upon

John J. L. Hogon aK: 5¹ eh

: the record. I offer this. tube, the defendant 8 rec-

tifier tube, referred to in the stipulation as ‘‘Plain-

.tiff’s Exhibit No. 5, two-electrode tu 5

: (Received in evidence and market hin- 5

tiff’s Exhibit No. 5.“ 3

Mn. Howson: I offer in evidence as Plaintiff’s 8

Exhibit No. 6, the three: electrode tube of the defend-

(Received in evidence and marked “Plaintiff's ;

Exhibit No. 6.7“)

Mn. Howson: I offer in ee as Plain-

tiff’s Exhibits No. 7 and‘8, the two DeForest D.

V. tubes referred to in the stipulation and identi-

- fied by those numbers.

(Received in evidence and 3 respec-

tively ‘‘Plaintiff’s Exhibit No. 7. and „Plain-

tiff's Exhibit No. 8.’’)

| Mr. Howson.: I may mention that these tubes,

Exhibits Nos. 5 and 6, are known as type H tubes.

I also offer in ‘evidenes the circular of the

defendant referred to in the stipulation as Plain-

tiff’s Exhibit No. 9. 4 a

(Received in e and marked Plain- 5

tiff 's Exhibit No. 9. See Volume IV, Plaintiſ „

Eschibits, page 28. 3 N 8 i

MX. Howson: I offer the accompanying leaf-

let of the defendant as Plaintiff, 8 Exhibit wee

ie AEs

Bee (Received in “evidence and e ‘Plain !

| tiff; s Exhibit No. 10.“ See Volume Ad Plaintiff's :

eee Mr. Howson : I offer in 1 as Plaintiff-s 4

Exhibit No. 11, the figure one diagram referred

‘to by the witness, : diagram of the -two-electrode

1 ane and I offer in evidence as Plaintiff's Exhibit )

No: 12, the figure two diagram, eee of ie es

bree electrode tube.

52 : John 5. L. Hogan 5

( (Received in evidence and marked respec.

tively ‘‘Plaintiff’s Exhibit No. 11,“ see Volume

IV, Plaintiff's Exhibits, page 31, and ‘Plaintiff's

Exhibit No. 12.’’ See een a V, ‘deta! ’s Ex

hibits, page 32. ) :

By Mr. Howson: _ ;

2. 6. Mr. Hogan, Iwill ask you now to tarn tof

first patent No. 1,558,436, and will get you to state a

specifically as you can, what you understand to be

principal characteristics of the thing set forth in that

patent. ;

A. Probably the simplest, and completest way to

answer that question is to run through the specifica.

tion and comment on the various portions i in an order

that will tie them together.

The invention is said at page 1, line 10, to nal

to electrical vacuum discharge devices, and to comprise

devices in which the electrical current is carried by

negative charges, called electrons, emanating from

the cathode independently of gaseous ionization, such

as occurring, for example, in the ordinary Roentgen

tube. a

In answer to the last catia: I disband briefly,

what this gaseous ionization which Langmuir is avoid-

ing, amounts to, and the Roentgen tube mentioned here

is the ordinary old art gas X-ray tube, which depended

kor its conduction upon gaseous ionization within the

evacuated vessel, Continuing at line 17, Dr. Lang

muir Bays that his present invention:

5 comprises improvements in *

discharge apparatus which make possible a

load e and N with the n

i that coniteetion, I mere of the aifieulty with

: the ee valve in its original ecg as an a

‘John v. L. Hogan „„

al 0 and the fact that it said e use

in that field, though it did operate as a laboratory rec-

tier. The same type of low load limit, both in power

and voltage, was found. in the most successful prior

art vacuum tube devices, namely, the audion. Its nor-

mal operating potential on the plate was between

twenty and thirty volts, en it was

run a little higher. 6

A typical audion would have so much ionization at

thirty volts, that, when the plate current was increased

to a point which passed even 300 dee the

tube would. show a blue glow.

N ow, that allows us to compute the maximum

power in the plate circuit, because just as in, the fila-

ment circuit, the power is the product of the voltage

times the resulting current, and if we have thirty.’ volts

and multiply that by 300 microamperes (it is the same

‘as 0.3 milliamperes, or the same as 0.0003 amperes)

then we find 0.009, or nine-one-thousandth of a watt,

as representing the plate power at the time when the

tube was grossly overloaded and ‘exhibiting extreme

‘ionization. There was tremendous variation among

the tubes, but that sort of operation was characteris-

tie of a good average audion tube of the time, and in

making that statement I am speaking from my OW n

experience with those tubes. 5 :

bn page 1, line 34, Langmuir says: a

“Tn order to distinguish electron discharge .

devices made in accordance with my invention

from the prior art, I will explain briefly the char-

acter of a pure electron discharge as distinguished

from a discharge through ionized gas.

: And he then goes on to refer to the old Geissler

5 tubes and the Roentgen X-ray tubes and the Crookes _

tubes, eee Which n Was accompanied by —

lonization. |

—

ee. John V. L. Hogan

In the next paragraph, beginning at line 47, 10

points out that the passage of an electric current across

a tube, ordinarily involves the movement of negative

charges called electrons, which, under the ony wet of

the impressed voltage, pass from the cathode: 4

anode, through the vacuous space. That, your Honor

will recall ag paralleling the description I gave of the

general old art.tubes. The ene continues: 2

If these electrons when moving above a cer-

tain velocity collide with gas molecules, ‘they tend

to ionize the molecules, gplitting them up into

electrons and larger and more slowly path

ions.“

„ 2 og a

g Then, in the next. path of the specification, Dr,

Langmuir sets forth some of the disadvantages’ and

characteristics .of the mixed electronic and ionie dis.

charge, which I may summarize in four points; First,

erratic and non-retroducible action. Second, disirite-

gration of the cathode; third, production of a blue glow

which may prevent operation; and fourth, the heating

of thé cathode by space current; and of course those

four points are additional to the. low power: mne Bs 5

low load limit already referred to.

On line 70, he refers to the ionization being pro-

duced by ‘definitely determinable voltages that are.

f different for different gases, and he states that in the

ease of the gases such as nitrogen and hydrogen: and

oxygen and argon, helium and neon, they are of tho

a onder of magnitude of from fifteen to twenty-five volts

. 1 thought it miglit be convenient to have those

voltages in the reoord at this 1 and so 1 will 1 5

ulate them: :

oe : : Wente = a 16.9 volts, *

5 Hydrogen, 13.3 volts.

e ee -.. Oxygen, 15.8 volts.

John V. L. Hogan 55

Argon, 15.1 volts:

Helium, 25.6 volts,

Neon, 186.7 volts.

Those values are collected from several diffenent

authorities, but I think that they are right, and if

there js any series of later measurements that shows

that they should be corrected, that anybody can find,

I will be glad to have the new figures.

| The reference to ionization voltages is at page 1,

line 76, at the end ef the paragraph fo which I have

heen referring, and which I identified by its first line.

: In the next portion of the specification, the para-

graph beginning ‘at line 77, Dr. Langmuir describes 5

and discusses the audion and the Fleming valve, as be-

ing incandescent cathode devices ee gas ioniza-

tion. :

At the end of page “i he points out that he knows

of no prior discharge devices operating in a practical

‘qsable manrér and without substantial ionization —. 5

effects with currents as great as about one-tenth of a

milliampere, and voltages. as high as about forty volts.

He then continues on page 2, line 4, saying that: 55

“Tn devices made i in accordance with my. fas.

vention gas ionization is either entirely absent or oe

is negligible and a discharge takes place which is

* distinct in its characteristics from the N

discharge taking place i in an ionized gas.“

Kdt in the batarioe of that paragraph, and in fay, „

for a farther portion of that page, he sets forth somé

ot the resulting characteristies that accompany or

characterize the pure electron discharge to which he

refers; that is to say, the discharge which is character-

ized by absence of or negligible gas ionization; and

rather than read the specification complete orf that

omg I have tabulated those seven e character- ‘

: 0 : oe 25 f 5

: i oe, seis hsp ee

56 eae ‘John V. L Hogan

; First, that the cathode is not ‘ay byt the :

current, page 2, line 9. 3 fis

Second: That a- be glow * not appear, 1 :

2, line 10. >

Third: That en mne dos hot appear,

page 2, line 11. Sai Loo le Re

Tun ‘Covet: What is that? 3 me 3

Tre Witness: Glass finorescenge is u visible :

effect, often olivs green in appearance, such as ong.

saw in the old X-ray tubes of the Roentgen type

Fourth: That when a sufficient quantity of cleo

trons is provided, that is to say, when the cathode is

hot: enough to avoid saturation at the voltage o

- cerned, the plate current of a simple tube, involving the -

invention, will vary as the 3

This text is long and has been trimmed here. Open the source document for the complete record.

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