Telephone communications module

Details Telephone communications module Telephone communications module

1976-08-06

1977-09-20

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D1403

Patent

active

D02458713

REFERENCES:
patent: 3553388 (1971-01-01), Mirrer
patent: 3657487 (1972-04-01), Schwanck et al.
patent: 3919497 (1975-11-01), Kuhfus
Telephony, Oct. 1975, pp. 38 & 39, GTX-400, PABX.

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