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

James J. Berken

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Automatic and sustained association of users with communications

Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent

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Method and system for testing subscriber circuits and wiring in

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of network terminating interface – subscriber trunk...
Patent

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Wireless in-building telecommunications system for voice and dat

Multiplex communications – Wide area network – Packet switching
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Profile ID: LFUS-PAI-P-1419951

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