Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1977-05-06
1978-08-29
Trafton, David L.
Communications: electrical
Audible indication
Percussion-type sound producer
340365R, 340365S, 340337, G08B 536
Patent
active
041107497
ABSTRACT:
A system for inputting data into a display device by touch-sensitive contact areas disposed adjacent the display device and including state of the art electronic recognition circuitry associated with the contact areas for synchronously converting the data to discrete elements of information. Specifically, the transparent contact pads are overlayed over a display with each pad coupled with a multiplexer followed by a synchronous quadrature filter function performed by yet another multiplexer in such a manner that data displayed may be altered.
REFERENCES:
patent: 3482241 (1969-12-01), Johnson
patent: 4015254 (1977-03-01), Strandt
patent: 4020391 (1977-04-01), Baxter
Janko Bozidar
Silzars Aris
Durk Kenneth M.
LaRue Adrian J.
Tektronix Inc.
Trafton David L.
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