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HEADQUARTERS 

ARMY SECURITY AGENCY 

WASHIN~TON 25 D C 

GSGAS-14 2Q S~Rtember 1949 

MEMORANDUM FOR: OlIIEF, ARMY SEnURITY AGI!jNCY , 

SUBJECT: Replacement of the CCM 

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REFERENCE: (a) .AFCllC DocU111ent 13/4 of 14 Sept 49 • r 

1. a. In connection with reference (a), it is deemed 

advisable to note that the ECM-SIGABA is covered by a number of 

patents or patent applications. 

b. Certain of these patents or patent applications are 

owned by the Teletype Corporation. The exact number of these 

cases, their serial numbers, and specific nature are unknown to 

this Agency, as they are being handled under Navy control. 

c. There are certain other patents or patent applications, covering certain subsidiary features which were invented 

by Navy personnel. Details or ownership are not known to this 

Agency. 

d. The be.sic cryptographic principles employed in the 

equipment are covered by the .following patent applications, still 

in a secrecy- status under the "Three-Year Rule" (Sec. 4894, R.S., 

as amended) and also under Public Law No. 700 (War-time secrecy 

for patent applications): 

Inventors 

Friedman 

Friedman & Rowlett 

Date filed 

25 July 1933 

2.3 Mar 1936 

In each of these two cases the u. s. Government owns the entire 

right, title and interest in the invention, throughout the U.S. 

and territories and dependencies thereof, but not elsewhere; the 

inventors have an irrevocable, assignable, and exclusive license 

to make, use a!Jd/or sell and to license others to make use and/or 

sell the invention. Attached hereto is a copy of the assignment in 

each case. (Incl. 1 and 2). 

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SECRET 

Declassified and approved for release by NSA on OG-04-2013 pur;uantto E .0. 13.52A, ... ' 

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.. .. REF ID:A70901 

5£CkET 

CSGAS-14 20 September 1949 

SUBJECT: Replacement of the CCM 

e. It is understood that in order to obtain a release from 

or a modification of the secrecy order applying to a patent application held up under Public Law No. 700, unanimous concurrences therefor 

must be obtained from the members of the Armed Services Patent Advisory 

Board. 

2. In connection with the general subject or the disclosure to 

the British or classified information concerning patents and inventions, 

attention is called to the U.S. - U.K. Security Agreement, a copy or 

which is attached hereto as Incl. 3. 

3. If a decision is made to release the cryptographic principles 

underlying the ECM-SIGABA to the British, the undersigned des!re that 

nothing be done which wl.ll Jeopardize the possibility or their obtaining monetary compensation from the British in return for a license to 

make use or the inventions covered by Patent Applications Serial Nos. 

682,096 and 70,412. I 

~~8:~ 'VtILLIAM F. FRIEDA' I 

3 Incls FRANK B. ROWLETT 

SECRET 
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REF ID:A70901 ' 

&lrtillll'I 

IBEBElS I 1 WUl!.am 1 1riedman, or ·~• m.atr:tet of 

Columbia, who. address 18 care o.tt1ce ot the Chief atpal, Ott:tCU', 

Muni tiotUt Buildiug, lfashing'tol:L, D 0 1 bave 1nT8Jltec1 & eertd.n 1--. 

provetnent in C1'J:Ptographic qstaa., for 1dl1ch I ban .cte. u. appllcation ~or Letters Patent or the United states• 8er1al 1fo fi8110961: 

Tiled ~ 25, 1933, and 

WRERF.AS, the invention ns made Yhile I wa.a an. ea;tlqree ot 

the War Department, and pertains to a device uateM. k h St.'tiq:m;l 

Defense, and 

WIIml.AS, the Govenimeut ot the United 8tat8'1 1a de~ ~ 

acqu1r1Dg the entire right, title and intceat la ald to the af4 

invention and in and to 8lQ' pateute that .., 1-°811.e 'the:recm,,_ 

NOW THEREFORE, in Consideration of the pr-mt .. *114 lllpt 

(f:l oo) dollar the Jteceipt ot •bieh ia harellf tcknmrledpa• ?Jt 

Wil.llam F Friedm.e.n,, bave sold,, assigned, IW.d tra:cat.-re4_, a4 It" 

these presents do here1V ael.l.• &ssip and tr&nstc unto 'the ~ 

0£ the Un1 ted sttltes of' .Amer1ca. &s repre11Cted la" lei}recretaJ:t ~ 

War, the entire right, title a-1 interen, thl:'au:,gb.out the tr.nit.a. Jtta• 

of America- aud the territorl.es and d.ependenciea tllm-eot'1 and not al• 

where 1n and to the said bmmtion relati»a to ~ la ~ 

graphic qstem, as described., olaS•ed and 1l.J.wtt%oatai bi 'th.a afore1tSA. 

application, Seria1 Bo 682.096, 8lld all Lattani P&tcmt l.mmad ~ 

11nd aq ~ti=-• M..11.Jd.olld. r.....ia, 8il4 -. .... _. ~--
REF ID:A70901 

the1-eot1 re~ to ivaelt and 1&gal ~e$enta.tivea an 11-revocable 

and assignable license, without payment or rOJ1l].~, ira1d llcenae to be 

exolusive• except as to Jltllmf'acture, use aud/or eaie ~ or ror tha 

United states GoYen:mient, to mate, use uiJ/or aell Qd to license 

others to make use a:nd/or -Uthe aubJect matter t:i£ add: invention 

relating to blproveaent 1.n Cl';Jptographic s,reteia. to the fUll end or 

the tel'.lll or ternls £or which Letters Patent or tiUI3' di'V'.ls1on.s1 re1tuJUes• 

re?lewals. exten8.ions or con-tinuation~ tliereot are nr- mQ' be grantedJ 

the said enUre right tiUe and interest to be held l:w' the Gowrnmeut 

or the United states of America• u represeuted q, t.he Sec.reter;.r of War 

and bis euccessora 1n ottice., to the fUll end of' the ternl or tC'llS for 

which said Lef.tera .Patent and aey di'rl.sious, reiaanes. relJ.QW"als or u ... 

tensionq thereof' are or _,- be vant.ed .s.a :tui:cy &ud entireq as the 

aa.m.e would have been hel<:! by me had t.b!.s assiglnnent. 8.J'ld se.le not be-en 

made 

Sworn to and subacl"ibed b.r the daid William F Yrl.edme.n 

bef'ore e thta L. J . Z. dlq" ot September, l.9)6 

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\tv , ..t tx ¥ ) b I 4-.w. I r kW 'ti 
REF ID:A70901 ... 

ll.5 llfO 

ASIIG HI•~ 

IRnMI •• 1fllll• r 1rl•dmaa at 'l'a•hUW'Oa Dllltrl•t el 

Ool•ltla an4 :rnnt B lawl•tt of .. ,, Pall• Cbvoh lrlillgtoa CcnmtJ 

tlrpala mo• 1Mldn11 11 Can otrt• er tM Olat•r ltcml otrl .... 

._, tt .. Bld.14lllB Waublgt• D a Ila• t11Hnt1d oerta111 lllpro,._t• 

1• Crntogr-.Ja• tor •blah•• haw mad.• an anltaattoa for i.tt•r• Pat1at 

of the Vn1t•4 Stat11 S.rtal •o 70 tll ftl14 llal'oh II 111& &114 

RBRl!.AI t • tnwntlcm ••• •d• while • ••n 1111Plo79•1 ot th• 

•ar Itl'P& tmant and. p1rta1111 to • dm'l'ia• uetul la tm 'lfatlcmal :n.r1a• 1 

and. 

1t EA tbe rowrnnert at the United State• 11 de•l.rou ot aoquiriag t • • tue riS"ht tl,1• Uld. lntenlt la and to tb9 1al4 illwntloa 

and in and to ·~ patent• that _, 111m tmNoa 

I 

S I ~I in ao1etd1ration or the ureal••• and Oll9 Cll OOJ 

4ollar t11e receipt of whtcb 1• bere'bJ aatnowledpd •• Wllllua P Prled-

'1181.1 a d F ank B Rowlett haYI 1old •••111184 and t:ran1terred and 'bJ 

ti'eH p .. t1 a.o her1b1 nll a •lf.'ll and traneter ato tm Gonrnmat 

t the t. 11 tee.. tat•• or Arulrica •• repreeented b1 the leant r7 or 'lu· 

t">.11 e t rlf t title d lntereat thro 1£'hcnlt t'l1 Unltied tiat11 or 

.l'T'ar1 r.. nd the terrltorie1 11ncl d1paclenai11 tblnot' and not •1-h•r• 

in a~d to the r-1d ln'V8ntS011 nlatlng to lmpro'1811i8nt 111 Cr11tograph1 

11 4eacr ed al~i1114 and lllu1trat.4 ln t • ator11&14 arpllaat101l ~•rial o 70 412 a.nd •11 L tter• Patent 1•"'184 thereon 11114 "'117 cont nU11tlCID8 
REF ID:A70901 

k.S lrf/ 

without paJtD,ent of ro7al h said l cente to be -.c1ut ft e:mep'\ u to 

manufacture us• an.4 / c;>r eale 'bJ' O'I' ror im 1hlltel Bt•1•• Gcnv·nment 

'\o -....e u.11 tmd/ or 1ell and 't(\ 11een1• other• t41 llll!lke u• ed./ or 

nll the subject aatter of • 14 izl:vantior nl•t.1Da' 'o lapro'RIHn.t bl 

Cryptograpbe to the f'u.11 end of" 1.hfll term or tens "for 'Wbioh lae\tera 

Patent or AJl:1 di 111 !on11 reh11 ll!ls r•ll9dl• ~•n•1tnie- or cauttnuattcm• 

thereof ~re or sa.7 be ~a...~ted the said entire ri&ht ~ttl• and 1ntere9' 

b t~• ~ecr~\~ry or R~r tl!.?"d ~ta auceesaora in ott'ice to th& full en4 of 

r.ne•al• or eit~n5 one thereof are or lff.!3 be granted ~• fully and entlr•l:J 

aa t~ aame •o~d bn'te bean h4!-ld b: • had tl>1a asatgment an«. aale no' 

been •de 

Swora to and subscribed 117 ~ ••td 7i1-, -- a.n.d Frank B Rowlett betore ae thia 4&7 of 

.A.pril 1936 

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RECORDED 

Transrera of Patmte 

n s Pmmt Otnce 

f' t.a~.ft..a,, it•/ 

./-

AP1 14 193b 

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