Intercom unit

Details Intercom unit Intercom unit

1995-06-15

1996-07-16

Morris, Sandra L.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Intercom

D14226

Patent

active

D03717844

REFERENCES:
patent: D185798 (1959-08-01), Loge
patent: D210026 (1968-01-01), Kahn
patent: D211092 (1968-05-01), Kahn
patent: D307587 (1990-05-01), Marcone
patent: D324864 (1992-03-01), Hector
patent: D327480 (1992-06-01), Soren
patent: D341593 (1993-11-01), Chang
patent: D349284 (1994-08-01), Robertus
Photograph of Old Intercom Unit Used by Greyfield Ind. undated.

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