4. Telegraphy
  5. Systems
  6. Printing

Leo I. Bluestein

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Automatic sharpness control circuit for a television receiver

Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent

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Multi-layer encryption system for the broadcast of encrypted inf

Telegraphy – Systems – Printing
Patent

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Two level encripting of RF signals

Telegraphy – Systems – Printing
Patent

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Use of two-way cable transmissions to augment the security...

Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via frequency channels
Reexamination Certificate

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Profile ID: LFUS-PAI-P-858456

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