Variable color display telephone

Details Variable color display telephone Variable color display telephone

1986-03-14

1988-02-16

Dwyer, James L.

Telephonic communications

Supervisory or control line signaling

Substation originated

379396, H04M 126

Patent

active

047260599

ABSTRACT:
A telephone with variable color display visually presents dialed telephone number in a color variable in accordance with the type of a telephone call, e.g, internal, external, local, long distance, and the like.

REFERENCES:
patent: 3899786 (1975-08-01), Greubel et al.
patent: 4160879 (1979-07-01), Sullivan et al.
patent: 4274217 (1981-06-01), Ohshima
U.S. West, Knowledge Engineering, Oct. 1986 received, 1986 printing date.

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