US PATENT SUBCLASS 250 / 559.18
.~.~.~ With discrimination of discrete light diffusing region

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

200  DF  PHOTOCELLS; CIRCUITS AND APPARATUS {11}
559.01  DF  .~ With circuit for evaluating a web, strand, strip, or sheet {13}
559.16  DF  .~.~ Detection of diffuse light {2}
559.18.~.~.~ With discrimination of discrete light diffusing region

DEFINITION

Classification: 250/559.18

With discrimination of discrete light diffusing region:

(under subclass 559.16) Subject matter wherein photocells are arranged to detect light reflected from the material such that the presence of a discrete light diffusing region is determined by a change in the reflected light intensity.