Teletype Mixer Apparatus for Coding and Decoding.
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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This patent discloses an apparatus for terminating teletype signal lines and mixing cryptographic teletype signals to furnish an enciphered teletype signal including a secondary operating mode of the mixer unit to retransmit the incoming teletype signal in the event enciphering or deciphering is not required. Author
- Non-Radio Communications