4. Recording, communication, or information retrieval equipment
  5. Video or audio transmission, recording or playback equipment
  6. Telephone equipment

Bing N. Sun

Inventor

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Guest service speakerphone

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Design Patent

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Guestroom telephone having single action message retrieval

Telephonic communications – Audio message storage – retrieval – or synthesis
Reexamination Certificate

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Method and apparatus for programming guestroom telephones

Telephonic communications – Supervisory or control line signaling – Substation originated
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2041463

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