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

Masazumi Isaka

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IP conference telephone system compatible with IP-PBX systems

Telephonic communications – Special services – Conferencing
Reexamination Certificate

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Packet switching system having communication control unit for se

Multiplex communications – Wide area network – Packet switching
Patent

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Voice data exchange system

Multiplex communications – Communication techniques for information carried in plural... – Adaptive
Reexamination Certificate

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Profile ID: LFUS-PAI-P-867798

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