Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent
1985-03-15
1987-03-24
George, Keith E.
Telephonic communications
Telephone line or system combined with diverse electrical...
Having transmission of a digital message signal over a...
178 19, 379100, 379355, H04M 1100, H04M 1272
Patent
active
046530860
ABSTRACT:
A communication terminal for processing voice and graphical information having a telephone set including a handset supported by a housing with an input device mounted within the housing for establishing communication with a distant terminal. The input device includes a flat display screen having a presentation portion and a switching field portion. A transparent resistive coating which conducts electrical signals and which is mounted over the presentation portion is manually contacted by a pen which extracts a signal for identifying the point of contact. The pen is used to touch the portion of the screen representing a dial keypad and various switching functions. The extracted signals are digitized and transmitted to distant terminals via a control circuit which processes both voice and graphical information.
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patent: 3801740 (1974-04-01), Buzzard et al.
patent: 3912860 (1975-10-01), Sasabe et al.
patent: 4431870 (1984-02-01), May et al.
patent: 4456787 (1984-06-01), Schlosser et al.
C. C. Cutler, "Displayphone: An Interactive Communication Experiment", Conference; Electronic Text Communication, Munich, Germany, Jun. 1978, pp. 323-329.
Musashino Electrical Communication Laboratory Nippon Telegraph and Telephone Public Corporation, "Telewriting Terminal `Sketchphone`", .COPYRGT. 1983.
Blueden et al, "Touchphone: A New Generation of Telephone Design", Telesis, 1985, No. 2, pp. 20-25.
Christopher J. S.
George Keith E.
International Standard Electric Corporation
Peterson T. L.
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