Telephone line and trunk status display

Details Telephone line and trunk status display Telephone line and trunk status display

1980-11-03

1982-11-02

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14113, D1403

Patent

active

D02667622

REFERENCES:
patent: D251843 (1979-05-01), Knoll
patent: D256918 (1980-09-01), White
patent: 4286124 (1981-08-01), Guttmann
patent: 4291198 (1981-09-01), Anderson et al.
patent: 4304966 (1981-12-01), Berin et al.
Telephony, Jan. 1, 1979, p. 30, GTE-60 PABX with Display.

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