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

Hajime Ogasawara

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Calling subscriber information notification

Telephonic communications – Reception of calling information at substation in wireline... – Blocking caller id transmission
Patent

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Communications device entry method and apparatus

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
Patent

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Modem pool system based on a packet communication procedure

Multiplex communications – Wide area network – Packet switching
Patent

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Operator connection control method

Telephonic communications – Special services – Repetitive call attempts
Patent

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Profile ID: LFUS-PAI-P-1197026

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