4. Multiplex communications
  5. Diagnostic testing
  6. Using oam cells

John A. Ritchie, Jr.

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Amplifier with a universal automatic gain control circuit

Television – Receiver circuitry
Reexamination Certificate

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Automatic frequency control of multiple channels

Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Reexamination Certificate

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Broadband communications system

Multiplex communications – Wide area network – Packet switching
Patent

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Frequency agile broadband communications system

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

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Multi-carrier frequency-division multiplexing (FDM)...

Multiplex communications – Channel assignment techniques – Combining or distributing information via time channels...
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1296981

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