Speaker and control panel for an intercom

Details Speaker and control panel for an intercom Speaker and control panel for an intercom

1990-03-06

1992-12-29

Shooman, Theodore M.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Element or attachment

D14159

Patent

active

D03321002

REFERENCES:
patent: D274518 (1984-07-01), Doodson
patent: D285681 (1986-09-01), Nakashima
patent: D289759 (1987-05-01), Koob
patent: D297517 (1988-09-01), Yuen
patent: D321686 (1991-11-01), Plozner
patent: 4584436 (1986-04-01), Boenning et al.

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