US PATENT SUBCLASS 345 / 180
.~ Light pen for CRT display

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}
180.~ Light pen for CRT display {1}
181  DF  .~.~> CRT having tracking capability

DEFINITION

Classification: 345/180

Light pen for CRT display:

(under subclass 156) Subject matter wherein the operator uses a handheld light pen to input positional information data to the cathode-ray tube display device*.

SEE OR SEARCH THIS CLASS, SUBCLASS:

179, for using stylus to input to a display device.