RE: [TSCM-L] {2282} Re: Classified Patents

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From: Robert Schlesinger <math..._at_earthlink.net>
Date: Wed, 16 Jan 2008 18:40:40 -0800

application/pdf attachment: US Patent Number 1657411 (Scherbius, 1928) - Ciphering Machine.pdf

Received on Sat Mar 02 2024 - 00:57:23 CST

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