US PATENT SUBCLASS 356 / 411
.~.~.~ With plural light detectors (e.g., photocells)

Current as of: June, 1999
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356 /   HD   OPTICS: MEASURING AND TESTING

402  DF  BY SHADE OR COLOR {10}
409  DF  .~ Fluid color transmission examination {4}
410  DF  .~.~ Of flowing liquids {1}
411.~.~.~ With plural light detectors (e.g., photocells)

DEFINITION

Classification: 356/411

With plural light detectors (e.g., photocells):

(under subclass 410) Subject matter including more than one photosensitive device.