US PATENT SUBCLASS 250 / 227.13
.~.~.~ Light pen

Current as of: June, 1999
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250 /   HD   RADIANT ENERGY

200  DF  PHOTOCELLS; CIRCUITS AND APPARATUS {11}
216  DF  .~ Optical or pre-photocell system {11}
227.11  DF  .~.~ Light conductor {14}
227.13.~.~.~ Light pen

DEFINITION

Classification: 250/227.13

Light pen:

(under subclass 227.11) Subject matter wherein a photocell and light conductor are combined in a single instrument configured to be hand held.

SEE OR SEARCH CLASS

235, Registers,

472.01+, for hand held optical coded record sensors.

345, Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems,

180+, for visual displays employing light pens.

382, Image Analysis, 59, for hand held image sensing means.