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

Koichi Shiraki

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Echo canceller for decreasing a deterioration factor of a...

Telephonic communications – Subscriber line or transmission line interface – Network interface device
Reexamination Certificate

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Hands-free telephone

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

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Signal processor for analyzing distortion of speech signals

Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent

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Profile ID: LFUS-PAI-P-1026771

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