04290052 is referenced by 192 patents and cites 7 patents.

A capacitive touch entry structure utilizes an array of at least one capacitive touch sensor fabricated upon a double-sided printed circuit board adhesively mounted upon a surface of a transparent insulative substrate. The substrate has sufficient thickness to safely insulate user personnel, contacting the substrate surface furthest from an electrode of the capacitive touch sensor, from electrical potentials present adjacent to the panel surface upon which the capacitive touch sensor is fastened. Touch sensor circuitry and interconnections may be advantageously fabricated directly upon the pair of conductive planes, sandwiching an insulative layer therebetween, to form the printed circuit portion of the structure. A conductive guard may also be disposed adjacent to the substrate to shield at least the lead portions of the touch sensors from capacitive effects.

Title
Capacitive touch entry apparatus having high degree of personal safety
Application Number
6/88287
Publication Number
4290052
Application Date
October 26, 1979
Publication Date
September 15, 1981
Inventor
Robert J Wojnarowski
Clifton Park
NY, US
Charles W Eichelberger
Schenectady
NY, US
Agent
Marvin Snyder
James C Davis
Geoffrey H Krauss
Assignee
General Electric Company
NY, US
IPC
H01G 7/00
G06F 3/02
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