4. Telegraphy
  5. Systems
  6. Printing

Laurance F. Safford

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Control circuits for electric coding machines

Cryptography – Electric signal modification – Having mechanical control of signal encryption
Reexamination Certificate

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Cryptographic telegraphy programming system

Telegraphy – Systems – Printing
Patent

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Start/stop teleprinter scrambler

Telegraphy – Systems – Printing
Patent

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Synchronous universal binary scrambler

Telegraphy – Systems – Printing
Patent

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Teletypewriter privacy system

Telegraphy – Systems – Printing
Patent

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Profile ID: LFUS-PAI-P-1084191

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