William F. Friedman NSA Archive - Diagrams, Descriptions, Patent Application Files, SISDE-29, Converter M228, Serial No. 443,320, Crypt System and Apparatus for Electrical Printing Telegraphy (16 May 1942), 1941-1953

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Files W.F.F. Archive Patent and Equipment Records Diagrams, Descriptions, Patent Application Files, SISDE-29, Converter M228, Serial No. 443,320, Crypt System and Apparatus for Electrical Printing Telegraphy (16 May 1942), 1941-1953

Patent Papers with Drawings, Descriptions and Protections for Cryptographic Systems (#443320), SISDE 29

Document A71739

2.58 MiB

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