Telephonic communications – Supervisory or control line signaling – Substation originated
Patent
1988-02-12
1989-07-04
Levy, Stewart J.
Telephonic communications
Supervisory or control line signaling
Substation originated
379396, H04M 126
Patent
active
048457450
ABSTRACT:
A telephone includes a variable color telephone display on which a dialed telephone number may be exhibited and a transducer for measuring a predetermined quantity. The color of the telephone display is controlled in accordance with the value of the measured quantity.
REFERENCES:
patent: 3924227 (1975-12-01), Stolov
patent: 4705406 (1987-11-01), Havel
patent: 4726059 (1988-02-01), Havel
Levy Stewart J.
Simons Michele
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