US PATENT SUBCLASS 345 / 164
.~.~.~ Rotatable ball detector

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}
163  DF  .~.~ Mouse {2}
164.~.~.~ Rotatable ball detector {1}
165  DF  .~.~.~.~> Photosensor encoder

DEFINITION

Classification: 345/164

Rotatable ball detector:

(under subclass 163) Subject matter wherein the mouse includes a rotatable ball for detecting movement of the mouse.

SEE OR SEARCH THIS CLASS, SUBCLASS:

167, for using a trackball for moving the cursor position.