4. Telephonic communications
  5. Having light wave or ultrasonic link for speech or paging...
  6. Including fiber optic link within telephone network

Yukiji Yamauchi

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High-speed ring LAN system

Multiplex communications – Wide area network – Packet switching
Patent

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High-speed ring lan system

Multiplex communications – Wide area network – Packet switching
Patent

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Portable wireless communication systems

Telecommunications – Transmitter and receiver at separate stations – Single message via plural carrier wave transmission
Patent

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System configuration of wireless PBX and communication method th

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

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Profile ID: LFUS-PAI-P-674724

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