Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Intercom
Patent
1996-12-25
1998-05-26
Bullock, B. J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Intercom
1403
Patent
active
D03946568
REFERENCES:
patent: D289754 (1987-05-01), Koob
patent: D310219 (1990-08-01), Carlile
patent: D313592 (1991-01-01), Morooka
patent: D313593 (1991-01-01), Morooka
patent: D313594 (1991-01-01), Morooka
patent: D321686 (1991-11-01), Plozner
Hotta Toshio
Kato Tetuaki
Aiphone Co., Ltd.
Bullock B. J.
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