4. Telephonic communications
  5. Audio message storage, retrieval, or synthesis

Yozo Sudo

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Cordless loud speaking telephone

Telephonic communications – Audio message storage – retrieval – or synthesis
Patent

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Phone conference system

Patent

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Telephone

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Element or attachment
Patent

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Two-way CATV system

Interactive video distribution systems – Video distribution system with upstream communication – Transmission network
Reexamination Certificate

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Profile ID: LFUS-PAI-P-568979

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