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Files W.F.F. Archive Patent and Equipment Records Correspondence, Description, Diagrams, SIS Systems SISDE-11-Cipher Wheel Commuters, Internally Controlled, Serial No. 70,412, Formerly Known AS M-161, 1935-1947
Amendments to Patent No. 70,412, 22 October 1942
Document A67467
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Application for Secrecy Order for Patent No. 70, 412, 6 June 1947
Document A67459
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Application of Wm. F. Friedman and Frank B. Rowlett-SN 70,412, Filed March 23, 1936, Cryptographs-Amendment
Document A67470
23.91 KiB
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Approval for Continuing of Patent Application No. 70,412, 3 May 1939
Document A67478
29.82 KiB
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Basic Cryptographic Principle of Navy Machine, 1 January 1947; Patent No. 74012
Document A67464
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Copy of Secrecy Order for Patent No. 70,412 Issued by Commerce Department, 20 May 1947; SIGABA M-134-C
Document A67460
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Cryptograph Description
Document A4161609
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Department of Commerce Rejection of Claims Regarding Patent No. 70412, 23 March 1936
Document A67489
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Description of Cryptograph Device Invented by Friedman/Rowlett; Patent No. 70412
Document A67507
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Description of Invention Related to Cryptographs, 1 January 1935; Patent No. 70412 Application
Document A67504
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Diagrams and Changes to Patent Application, Friedman/Rowlett, 31 August 1935; Patent No. 70412
Document A67508
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Draft Specifications and Drawings of A New Means of Controlling Cryptomachines; SISDE 11
Document A67452
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Improvement In Cryptographs New Patent Application, 12 March 1936
Document A67500
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Improvement In Cryptographs, Patent Application Ser. No. 70,412, 29 September 1936
Document A67486
68.19 KiB
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Improvements In Cryptographs; Patent Applied for, Serial No. 70412, March 23 1936; SISDE #11
Document A67440
49.5 KiB
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Invention of Mechanico-Electrical Control of Cipher Wheels for Small Cryptograp
Document A67462
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Object of Friedman/Rowlett Cryptograhic Machine, 29 June 1935; Patent No. 70412
Document A67509
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Patent Application No. 70,412 Placed on File Within Patent Section, Signal Corps, 26 March 1936
Document A67498
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Patent Application, Ser. No. 70,412, Improvement In Cryptographs, 21 September 1939; SISDE 11
Document A67468
36.57 KiB
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Patent Office Invocation of the "Three Year Rule" Regarding Friedman Application
Document A67454
40.81 KiB
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Power of Attorney In Re Application of Friedman and Rowlett, Serial No. 70,412, 23 March 1936
Document A67472
28.8 KiB
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Principles of Cryptographic Invention of Friedman/Rowlett, 15 February 1936; Patent No. 70412
Document A67512
124.38 KiB
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Record of Facts In Connection with Friedman/Rowlett Cryptologic Invention, 31 August 1935; Patent No. 70412
Document A67513
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Record of Military Invention, Friedman/Rowlett, 31 August 1935
Document A67502
123.12 KiB
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Request for Continuing of Patent No. 70,412 for A Period of 3 Years
Document A67476
69.13 KiB
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Requirement for Division and Election Re Patent No. 70412 Is Withdrawn, 23 March 1936
Document A67473
34.79 KiB
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War Department Letter Acknowledging Request for Secrecy of Patent No. 70,412, 15 July 1947
Document A67457
46.4 KiB
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War Department Request for Continuing of Patent No. 70, 412
Document A67484
48.49 KiB
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