4. Cryptography
  5. Communication system using cryptography
  6. Data stream/substitution enciphering

David Knappenberger

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Method and system for broadcasting digital audio and video...

Television – Television transmitter circuitry
Reexamination Certificate

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Method and system for broadcasting digital audio and video...

Television – Television transmitter circuitry
Reexamination Certificate

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Method and system for broadcasting digital audio to a radio

Cryptography – Communication system using cryptography – Data stream/substitution enciphering
Reexamination Certificate

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Method and system for broadcasting/distributing digital...

Cryptography – Communication system using cryptography – Data stream/substitution enciphering
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2038952

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