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

Masakazu Shirakawa

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Control data transmission system for private branch exchange

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
Patent

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Data transmission system

Multiplex communications – Wide area network – Packet switching
Patent

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Electromagnetic shield plate

Electricity: conductors and insulators – Anti-inductive structures – Conductor transposition
Reexamination Certificate

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Electronic exchange system for portable stations

Telecommunications – Radiotelephone system
Patent

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Mobile station unit and channel switching method

Pulse or digital communications – Repeaters – Testing
Patent

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Profile ID: LFUS-PAI-P-673891

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