US PATENT SUBCLASS 345 / 167
.~.~ Trackball

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}
157  DF  .~ Cursor mark position control device {7}
167.~.~ Trackball

DEFINITION

Classification: 345/167

Trackball:

(under subclass 157) Subject matter wherein the cursor mark position control device is a rotatable ball rotated by the operator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

164, for a rotatable ball detector in a mouse.