4. Multiplex communications
  5. Wide area network
  6. Packet switching

David R. Irvin

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Adaptive call screening method

Telephonic communications – Call or terminal access alarm or control
Reexamination Certificate

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Adaptive sub-band echo suppressor

Telephonic communications – Echo cancellation or suppression
Patent

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Adaptive trunk-compression system with constant grade of service

Multiplex communications – Wide area network – Packet switching
Patent

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Apparatus and methods for assigning spectral and...

Telecommunications – Radiotelephone system – Usage measurement
Reexamination Certificate

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Audio-output for a portable radio telephone utilizing a vehicle'

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Patent

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Profile ID: LFUS-PAI-P-439265

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