4. Telecommunications
  5. Transmitter and receiver at same station
  6. Radiotelephone equipment detail

Tien-En Chen

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Method of changing the code of a radio communication system

Telecommunications – Radiotelephone system – Security or fraud prevention
Reexamination Certificate

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Wireless telephone dialing method

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Patent

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Profile ID: LFUS-PAI-P-1277967

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