Intercom master control unit

Details Intercom master control unit Intercom master control unit

1984-06-11

1987-05-12

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

Patent

active

D02897580

REFERENCES:
patent: D244877 (1977-06-01), McLaughlin
patent: D269780 (1983-07-01), Doodson
patent: D274518 (1984-07-01), Doodson
patent: D278054 (1985-03-01), Vajdaffy
patent: D281500 (1985-11-01), Yamagata et al.
patent: D281501 (1985-11-01), Yamagata et al.
patent: 4019139 (1977-04-01), Ortega
Radio Shack 1983 Catalog, p. 107, bottom of page.

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