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Summary

Description
English: See Apparatus for coding and decoding, US Patent 2046276, Applied for March 30th 1929
Date
Source Cipher Apparatus, US Patent 2270137, Applied for 11 May 1939
Author Unknown authorUnknown author


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en:Category:Cryptographic hardware

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Overview of the Mechanism of the O'Brien Cipher Typewriter

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10 February 2021

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current12:00, 10 February 2021Thumbnail for version as of 12:00, 10 February 2021587 × 828 (127 KB)OldnoccerUploaded a work by Unknown from Cipher Apparatus, US Patent 2270137, Applied for 11 May 1939 with UploadWizard

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