4. Telecommunications
  5. Radiotelephone system
  6. Including private cordless extension system

Toshiyuki Sugitani

Inventor

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Calling apparatus and calling method in a telephone

Telecommunications – Radiotelephone system – Including private cordless extension system
Reexamination Certificate

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Door phone system

Television – Two-way video and voice communication
Reexamination Certificate

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Portable telephone apparatus and changing method of...

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate

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Wireless communication system and communication method

Multiplex communications – Communication over free space – Combining or distributing information via time channels
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2797133

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