(a) 

(b) 

(c) 

• ~~~ O~~~~~J;~N~·N 

iN.&R DEN ~·.i'l~NT 

Office of the Cl.::.Pf of A .... r Service 

Pata11ts Section 

Munitions Building, Washington, D. C. 

(Use separate sheet for each invention) 

IQ!J.OW INSTRUCTIONS ON BACK 

Invento~: (1) WUHezi r. Friedman 

(1, Name (f') frank B. Rcmlot1; Wi,..,,. .. f Si ~ I S___. (2) Rank, position or em ·oyment: r, "'"'""6 oi ~l. nt~ ... u..v.1.ae, 

(3) Permanent address: ~~ 393~ ~r~°BR~ii.Uag~~P,BB.o. Title of Inv~ntion. ~~) ..!est FallaL'flurch, Vir&inla. 

Improvooents in O:cypto~aphs 

Description of Invention. 

Ye:mo and methods for apwiodicnlq controllin.,~ the d1s}laot..11ents 

ot rotat:>ble com1.:mtators oi' cry9to~a.1.llia e!:l"}loyinr. connc..ction 

ehaneera of' this type. 

(d) Dates and places of Invention: 

(1) Conc.eption by inventor .Tune lS• 1935 at i·o ghineton 

( 2) Disclosure to others :_-:..Tun:.:£-..l.,.5.,..,_.l.9..,3111o115.__ ____ at \?.1ahtngtnn 

(3) First sketch o:r draw1ng:J'UD£ 151 1915 

(4) First wri..tten description: June i=91 1935 

(5) Completion of model 

at e;,1anf net.on 

or full sized device : ___________ a.t _____ _ 

(6) First tast or opera- tion of invention. ____________ at _____ _ 

(e) Results of tests, and 

exterrt of use of invention: 

( f) Names of persons having knowledge G'.il.2.Se J1, ~"":e 

of facts stated under (d)~· Lt, w, P. Corderm,.n, Sifn~l Cor;.>B 

(g) Prior Reports: 

(h) Patents and Patent applicatl.ons: 

( i) Rights of U.S. Government : 

(J) Licenses or Assignment 

(k) Contracts involved: 

Contract ors 

Contract No. and date 

Subject matter "'-" 

Location of Plant 

Official title or 

status of employment 

of invent or: ~ 'Z- ""1.JO-

( l) Signature of witness and date: 

Q1:11'< ?t 41,.J..-..,,,,.... 

(m) Remarks of Forwarding Officer: 

None 

~o bG a;:>_>lb.:d tor. 

None 

Address 

Typo of Contract 

@'pproved for Release by NSA on 09-09-2013 pursuantto E.O. 1352e-----------

(OYer) «-892,A.S. Rev.6/2/24 
I 

I 

\ 

• REF ID:A67502 

INSTPUCT!Ol"!S 

The t~llOW"ing information will be given under ~he headings • indicated: 

(a) '!he inventor should give h1s permanent address He should also give 

his rank, corps, position or auatus of employment at the time invention was made. 

(b) '!be title of Uia 1nve~t1on should star-t with words 1ndicat1ng the 

class to which the lrnVention belongs, such as "Method of" or 

"Precess of" in cace the invention rela~es to a method or process· 

or the nawe of the article, de1ica or type of nachine 1n case the' 

invention relates to an article, device er machine, or the narJe 

of the material or composition in case the invention is an improvs1ent in material or· composition. 

(c) The description of the invention aay be brief, provided reference 

is made to detailed specifications and drawings, whLch should be 

identified by dat~ a,.,d file nwnber ii official, or should be 

attached to the report 1f not part of the official records of the 

War Department. In eitner cade, all drawings and descriptive 

pamphlets relating to the invention showld be listed. 

(d) Care should be taken to 6J.Ve the earl~est date on W4ich the invention suggested itself to you, even tho~gl: it was not co~pletely 1n 

mind. If t!le invention co~prises different invent~ve 1'ea.s 1 give 

the datea with referenc6 tu each part o! the inv~ntion ae,arately, 

taking care to ider.t1fy each part clearly in the descri~tion of 

the invention. 

(e) 

(t) 

(g) 

(h) 

(1) 

(j) 

(k) 

State whether 

the degree-of 

a1zed device. 

separatp "use 

or not the invention was f~une to oe operative, and 

aucceas atta1ned at each te't of the model or full 

In statiag the extent of use of the invention, 

oy the Goverlll'J'ent 11 frat:! 11commercial use". 

State the names of pezsons who had knowled6 e of the inven~ion 

and facts con~erning 1t on or about the datea mentioned. 

Has description of ir,ventiun or report Qf test, it any, been submitted to officers of the dar Dep&.rt~ent! If so, when and to whom' 

Give references to all prior reports, 1rclud1ng ~ll infol'IIJB.tion 

needed to locate same i~ files. 

List all applications for patents by f1lin~ da.teg, ser~al nw~ber 

and title. Liat all patents ~y patent nwnber, data of grclnt, and title~ 

Has tender to the Uruted States been r.ilade' If ao, when and to whom' 

If not, tender the use of the invent~on to the United States or 

explain why not. 

State what, if any, rights in the inven~ion~have baen granted to oth~rs, including extant of i~terest granted and date or recorchng a~a1gmrent or lictll"te in Patent Office. 

If contracts have been olaced tor the iz1venti.on1 or if the inven- t~on was made in cannect1on with the parfol"IDl!.nce of a"contract in 

which the United States is interested, the facts should be given 

briefly, including contractor's name and addrasa, Contract No. and 

Date of Oontracti SubJaat Matter, Location of Contractor's Plant wh~re work was done; and Official Ti~le or St•tus of Employment of 

Inventor. 

(l) It is desirable that the 111tneas bt ~li§L1'. ntf tne facts stated 

concerning the invention and have a sufficient understanding of the 

invention to descr1be its conatruct1on and operation. ,._~ I' .... .. ... ·-

(m) in.a f arwarding officer should &J.VB his opinion of the value of the ~nv•ntio~ to the u.s. and whether or not the )rogpective develo~ 

me.'lt or the art to Tl..1ich t':le invention relates would make it advisable 

to protect the invention and the Government 1 s right \o ,use the BRmEt 

by C!Z1 application for patent. 

NS-3680/MB -2- W-892, A.~.