US PATENT SUBCLASS 257 / 435
.~.~.~ With optical shield or mask means

Current as of: June, 1999
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257 /   HD   ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES)

414  DF  RESPONSIVE TO NON-ELECTRICAL SIGNAL (E.G., CHEMICAL, STRESS, LIGHT, OR MAGNETIC FIELD SENSORS) {4}
428  DF  .~ Electromagnetic or particle radiation {2}
431  DF  .~.~ Light {15}
435.~.~.~ With optical shield or mask means

DEFINITION

Classification: 257/435

With optical shield or mask means:

(under subclass 431) Subject matter with means to spatially

or temporally block all or part of the light incident on the portions of the device receptor region, other than the intended region.