US PATENT SUBCLASS 250 / 559.11
.~.~ Detection of both reflected and transmitted light

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}
559.11.~.~ Detection of both reflected and transmitted light

DEFINITION

Classification: 250/559.11

Detection of both reflected and transmitted light:

(under subclass 559.01) Subject matter wherein photocells are arranged to receive light which has been reflected by the material and light which has been transmitted through the mate-rial.