REF ID:A39629 

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IN THI URI!ED STATES Pl'l'EIT OWICI 

* REJ Application ot 

WILLUll F. FRIEl>llil 

and FRANK B. ROll.Eft 

Serial Humber 

70.412 

Piled 

23 llarch 1936 

POJ' 

CR!PTOGRAPHS 

* 

* Division S.3 

* 

* 

• 

• 

* • * * * * * * * 

The Bonorable Collmiaeiomr ot Patent. 

1faahbrgton 25, D. C. 

Sir: 

Thia is in reaponae to Patent Otfice action ot 4 October 1945 in 

the above-identified application tor patent. Please amend the 

case, which is being prosecuted UIJde the so-called thr....,-ear 

rule, as rollowa 1 

IH THE CLADS 

Claia 21, line 2 - Arter "indicating elements• 1naert - electricalll' 

relat.ed therewith - • 

2 - Cancel "add elements being elect1"1c-•. 

3 - Cancel "•111' interrelated•. 

5 - After •interobangeable• cancel th• amammnt or 

20 Juq 1942 and inllert - and 1nclud1Dg .... 

related therew1"11 tor moving the same ac001"d1Dg 

to a law establiamd b7 the output ot said 

~tors - • 

1 

pproved for Release by NSA on 09-27-2013 pursuant to E. 0. 

13526 
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Claim .34, line 2 .. After "message" insert - of characters - • 

2 - Arter "relation" 1naeZ't - comprising a 

plurality of' variable tunctions - • 

4 - Cancel "changing the" and insert - providing 

a ditf'erent • • 

S - Cancel 11111 a manner dependent on the said 

cryptographic". 

6 - Cancel "relationship tor said tirst charact.er" 

and 1naert - bJ ft1"11ng a said t'unction selected 

according to an unpredictable rule .. • 

Claim 35, line 2 - li'ter 11111easage" ineert - ot characters - • 

2 - After "relat1onahlp11 iuert - comprising a 

plurallt,r ot Yariable tunctlona - • 

4 - Arter "changed" 1uert - at predeterm1ne4 

intervals by "l&l'y1ng a said hnction salected 

to an unpredictable rule. • • 

5 - Ca.noel. 

6 - Camel. 

Claim. JJJ, liDa l - Betore "comutatora• inllert - crn>toP'aphic - • 

1 - A.tter 11camutato.rs" inllert - mounted ~or rotation 

ralatiw to each other to establish ditterent 

pluralities of elacVical paths theretbrough - • 

2 - Afteit •'Va17• insert - the said electrical patha - • 

3 - Cancel "tberetbrough•. 

3 .. After "coaautatora• imert - easential.11' sillilar 

to the t.lrat-ment1oned CIGllllllU'tatozw - • 

2 
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Claim 40, line ; - Cancel "V8.17" and insert - select comautatmw 

ot the tirflt-mentioned pluralitf tor movement 

in - • 

5 - Change "fashions" to .. fashion - after which 

insert - to 'ftZT - • 

Cla!a 411 line 2 - Cancel "or the 11Jce". 

3 - Cancel •or the like•. 

Cla!a 421 line 2 - Cancel •or the like•. 

3 - Cancel "or the 11.lce". 

Clalm 21 bu been amended to define more detiniteJ.y the eleotricalJT 

related ele..n-. It bu been :tllr\her amnded to clarU)' the term 

"law" which appeara in tbe latter part thereof, the explanation 

being that a different cr,ptographic law or rule is eatabllahecl tor 

each atepwlae displacement ot a cr)'Ptographic commtator notwithatallding it ia also not inacourate to sq that the ccmmtator cu• 

cade in and ot itself det-wf•1 the law ot t.be •ch'•• 

Claims 34 and 35 have been changed substantialJT 1n meaning although 

the7 retain the .fOl'lll or •thod claims. The claims are now directed 

to the conoept of providlng a series or nr1able steps in a crntographic process and then 'VU")'ing the steps select1vel.7 as required 

b.r an un[4"941ctable rule or keJing sequence. 

Cla111 40, as 81!8ftded, describes the nature or the comautaton, aounta 

tbaa in detiD!te poaitiom relative to each other, and expla1na the 

manner in which the outputs thereot are utilised. It ill belieTed no 

longer subject to the cr1Uo1am or lacJc ot utilltJ'. 

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REF ID:A39629 

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AppllcaDta' •tbod could be applied to UV' ot the drdoee or the 

patients ot record although 80ID8 reorpn1ut1on would 1n each cue 

be neces8&17• Considering Jlorris, 1,9531829, tor uaapl.e, all 

tha1' wa1d be requ1ftd would be the "'1l1zat1on ot the output, ot 

a oantrol --like that or the .lppl:l.oanU to tile ••lecUan ot 

pnla 25. The •oh'l11ea ot lorn Biid Saherld.m ooald not be readU, 

apMd tor 1iM practiae ot AppliouU' prooeaa aince the 017Ptognpbio wta1ioZ'B tbareot are poait.ift~ geared to a -.1D. c1r1.,... 

1111 ei-t. It, -..... , t.11.e rotor-driving U'ftlllW°' ot ran 

amt 8ohel'b1• llboa14 be np1ue4 bJ known ratah..t; and pawl when11•, 

tbe rmub -.de alxna ID oannecUon with llarrla wul4 appli'. 

~,a pmoil ml paper •na'oa can be eaall.r en'l'is.f.amd. 

le•~. 

IILLIAJI r • .FRIEDM•I aD4 J'l1A.B B. mn, 

lppl.1oants 

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