Intercom sub-station

Details Intercom sub-station Intercom sub-station

1996-12-27

1998-05-26

Bullock, B. J.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Intercom

1403

Patent

active

D03946533

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

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