c cnr I:BEM'f I. iL 

ft.S-71 AS-23 14 Feb 47 Patent Application 

For information upon which to 00.se a reply. 

1 Incl 

Disp Form dtd 11 Feb 47 

GEORGE A EICHER 

Colonel, Signal Corps 

fr Patents & Invs. Br, Legal._Bra~~=h;.._~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ TIIRU 

AS-80 

TO 

ft.S-23 A.s-71 19 Feb 47 1. Applications for patent:, serial numbers 4 78,193, 

478,868, and 551,172, are forwarded for your comments and 

recor:mendations. 

2. The Research and Development Division has no objection· to the release of 

the applications. 

4 Incls S. KULLBACK 

Added 3 incls Chief ,Hesearch and Developnent Division 

2. Ap:rn SN 478,193 

3. Appn SN L~78,868 

4. A! pn SU 551,172 

Declassified and approved for release by NSA on 09-11-2013 pursuant to E .0. 1352a 
.com 'IBF.Hf'i'IA1 

REF ID:A10~4 ., 

!l.S-~ -~-71 19 Uay 47· 1. ln response to the oral request by Captain 

WoehJ.ke for recor.imendations and cor.u:i.ents re:-:;arding :μi.tent 

applications of ·.iilliam i". Friedman, serial rrumbers 

478,193, - 4?::.,,,868, and 551,172, numbers 47?.,193 and 

1+78,868 v1ere circulated throu~h AS-00 and PS-90. 

2. Certain baclr.ground information v!ith respect to the two c.::..ses and brief' 

descriptions of the inventions thereof appear in Comment 1. 

J. AS-70 concurs with the conclusions of AS-80 and N3-CJJ. 

4. Serial Number 551,172 was not circulated since the application had never 

been classified. A draft of the case was considered before filing; the vie\'VS or 

the interested branches and individuals may be· found in an R & 'ii, 21+ July 1944, 

subject: Authenticating Device, through Chief, C Branch, to CoIIlr.1'Ulding Officer, 

Signal Security Agency, and six subsequent actions, the final action being an 

a1 ·pr oval by the Assistant Chief, Signal Security Aeency, for the filing of an 

unclassified patent application. 

5. Return of the copies of the applications is requested. 

3 Incls 

1. n/c 

2. n/c 

J. Pat Apph SN 551,172 

G< if:i«'IDEiff'IAL 

S. KUlLB~CK, Chief 

Research Laboratories Division 

Ext. 284 

\ 
REF ID :A10~24 

• 

3. Af3-70 .:.S-90 15 l:'.D.y 1947 Apμlic~tions for Patent -SN 478, 193 c1Ild 

SN 4781 868 (cont'd) 

2 Incls 

n/c 

Operatic.ns Division has no objections to 

the declassify:ing ;...nd release of these pa.tent 

applications. 

FRA.m: B. no~·rr.mT 

Chief, Operations Division 

Ext·. 315. 
ID:A105124 

• • 

T!-ffiU: ii.S-80 

Applicati~ns for patent SN 476,193 and 

!~S-o/J AS-71 6 Hay 47 SN 478, ~ 

1. I:r..clcm1res 1 and 2 are forwarded for evaluation and rM.urn. 

2. The applications nre currently classified confidential. The 

nuostion is whether the inventions r.iay be declassified so th:,t patents 

can issue and be exploited commercially. 

J. Poth disclosures relate .to ~·acsimle privacy apparatus. 

a.. Serial Nur:ber iar.,,193 involves the derivation of an on-off 

signal fror.i a black and v.hite message (picture) and another on-off signal 

from a dumey picture. The dw1ay message may or .mey not be intelligible in 

itself. 'Ihe two siCJlals are added by a system of relais so that, when 

message and dUl!lrzy" signals are alike (both ''ons 11 or both "offs"), an off 

signal is transmitted while two unlike currents result in the transmission of 

an on signal. This is, in other words, according to the so-called Vernam 

rule. J~t a receiving station, the durmny messa. e or key is subtracted. 

b. Serial Number 472, 868 describes a sys tern essentIBll.y like 

the above except that addition is accomplished by tubes inste.a.d of relays. 

4. Further information about the subject applications rruzy be 

obtained if necessary, from Chief, AS-72. 

2 Incls 

1. Pat Appn SN 478,193 

2. Pat Appn SN 478,868 

• 

S. Y.UI.LBACK, Chief 

Research laboratories Division 

Ext. 284 

2. THRU: .AS-80 9 May" 47 The Security Division has no objection to the 

AS-90 

TO 

AS-71 

2 I.ncls 

n/c 

declassification and release of these patent applications. 

A. SINKOV 

Chief, Security Division 

Extension 241 , . 

GC'NFill~lTU~ 
• 

~~10512. 

HEADQUARTERS 

ARMY SECURITY AGENCY 

WASHINGTON 25 D C 

lDGAS-71 11 October 1946 

SUBJECT Patent Application or Friedman and }lauborgne, SH 478,068 

TO Chief Signal Officer 

D:irector, Le gal Divis 1.0n 

Patents and Inventior~ ~ranch 

4C Z14, The Pent atJ>n 

rashington 25 1 D. C. 

ATTE.\ITION Ur. Harry U. Sara€J)vitz 

1. Inclosed herewith, lll dupl.J.cate, is a proposed amendment to 

the subject application. 

2. The amendment is due lll the Patent or.rice 16 October 1946 • 

FOR THE CIAIEF' ARifY SECURITY ..L\"E?1CY 

1 Incl 

mendnent lll dup 

SIGLG-3-HS (ll Oct' 46) 

/s/ S Kullback 

S KULLBaCK 

1st Ind. 

Chier, Research and Develol'X'ent 

Division 

"''D1 OCSigO, 'hshington :?5, D C 1 15 October 1946 

To Chief, nrmy Security .rtgency, The Pentagon BuJ.ldl.llg, 'Tashington 25, D C 

.Attn Ur Stauffer 

ThJS is to advise that amendment covering subject case was fJJ.ed 

in the Patent Office on 14 Oct.ober 1946. 

1 Incl 

w/d 

FOR THE CHIU' SIGI'lAL OFFICER 

00HPIBEi!f'f!,J, 

/ s/ Harry M. Saragovit z 

HARRY lf. SAIUGOVTIZ 

Asst. Chief, Patents & Inventions &-anch 

Legal DivisJ.On.