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REF ID:A39742 

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A S S I G N M E N T 

WHEREAS we, William F. Friedman, of Washington, District et 

Columbia, and Frank B. Rowlett, of F.ast Falls Church, Arlington County, 

Virginia, whose address is Care Office of the Chief Signal Officer, 

Munitions :Building, Washington, D.c., have invented certain improvements 

in Cryptographs, for which we have made an application tor Letters Patent 

of the United States, Serial No. 70,412, filed March 23, 1936~ and 

WHEREAS, the invention was ma.de while we were employees of the 

War DepartmP.nt, and pertains to a device uaefUl in the National Defense 

and 

t'HE~..EAS, the Government of the United States is desirous of acquiring the entire right, title and interest in and to the said invention 

and in and to any patents that may issue thereon; ) 

NOW, THEREFORE, in consideration of the premises and one ($1.00) 

dollar, the receipt of which is hereby acknowledged, we, William F. Friedman and Frank B. Rowlett, have sold, assigned, and transferred, and by 

these presents do hereby sell, a~sign, and transfer unto the Government 

0f the United States of America, as represented by the Secretary of War, 

the entire right, title a.nd interest, throughout the United States of 

America, l'l.nd the territorles and dependencies thereof, a.nd not elsewhere, 

in and to the E~id invention relating to improvement in Cryptographs, 

es described, claimed and illustrated in t.e aforesaid application, Serial ~o. 70,412, and all Letters Patent isBUed thereon and ~ny continuations, 

pproved for Release by NSA on 11-20-2013 pursuant to E. 0. 

13526 

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REF ID:A39742 

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41v1siona, renewals, and reisau.es or extenaions thereof ; reserving to 

ourselves and legal representatives ~ irrevocable and assignable license, 

without p&Jlllent of royalty, said license to be exclusive, except as to 

manufacture, use and / or sale by or for the United States Government. 

to malat, use u.4/ or aall and to license others to make uae and/ or 

sell the subJaet m&tter ot said inven'Uor1 relating to improvement in 

CrJPtographa, to the full end of the term or terms for which Letters 

Patent or &111' divisions, reissues, renewals, extensions or continuations 

thereof are or may be granted ; the said entire right, title and interest 

to be held by the ~vermRent of the United States of .America, a.a represented 

by the Secretary of War and his successors in office, to the full end of 

the term or tenna for which satd Letters Paten~ and any divisions, raisaues. 

renewals or axtenaiona thereof are or may be granted, as fully and entirely 

as the same would have been held by us bad this assignment and sale not 

bean made. 

Swam to &nd n.bocribed b7 the said 7l1 P. Friedman 

and Frank B. Rowlett before me thia day ot 

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RECORDED 

Transfera of Patents 

D. s. Paamt om.ca 

APR 1 4 1936 

C(}~S-t1V~ 

~ER~ PATENTS 

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