US PATENT SUBCLASS 345 / 173
.~ Touch panel

Current as of: June, 1999
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345 /   HD   COMPUTER GRAPHICS PROCESSING, OPERATOR INTERFACE PROCESSING, AND SELECTIVE VISUAL DISPLAY SYSTEMS

156  DF  DISPLAY PERIPHERAL INTERFACE INPUT DEVICE {8}
173.~ Touch panel {5}
174  DF  .~.~> Including impedance detection
175  DF  .~.~> Including optical detection
176  DF  .~.~> Transparent substrate having light entrapment capability (i.e., waveguides)
177  DF  .~.~> Including surface acoustic detection
178  DF  .~.~> With alignment or calibration capability (i.e., parallax problem)

DEFINITION

Classification: 345/173

Touch panel:

(under subclass 156) Subject matter wherein the peripheral input device includes a planar touch sensor which determines the position of a touch.

SEE OR SEARCH CLASS

178, Telegraphy,

18.01+, for structure directed to an input digitizing writing tablet and not to a display.

200, Electricity: Circuit Makers and Breakers,

512+, for membrane-type solid contact relating to a switch of a touchpad.

340, Communications: Electrical,

407.1+, for tactual indicator.