Intercommunication apparatus

Details Intercommunication apparatus Intercommunication apparatus

1974-09-11

1977-03-01

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D1403

Patent

active

D02435365

REFERENCES:
patent: 3258541 (1966-06-01), Hopkins
patent: 3286040 (1966-11-01), Andregg et al.
patent: 3428758 (1969-02-01), Hall et al.
patent: 3515814 (1970-06-01), Morgan
patent: D220338 (1971-03-01), Goldman et al.
patent: D225648 (1972-12-01), Barrault
patent: D225747 (1973-01-01), Haaheim et al.
patent: D232034 (1974-07-01), Shoys

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