US PATENT SUBCLASS 345 / 181
.~.~ CRT having tracking capability

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

DEFINITION

Classification: 345/181

CRT having tracking capability:

(under subclass 180) Subject matter wherein the electron beam of the CRT traces the movement of the light pen on a surface of the CRT.