US PATENT SUBCLASS 250 / 216
.~ Optical or pre-photocell system

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

200  DF  PHOTOCELLS; CIRCUITS AND APPARATUS {11}
216.~ Optical or pre-photocell system {11}
227.11  DF  .~.~> Light conductor {14}
566  DF  .~.~> Including coded record {1}
573  DF  .~.~> Fluent material in optical path {4}
221  DF  .~.~> Controlled by article, person, or animal {1}
225  DF  .~.~> Polarizing
226  DF  .~.~> Color (e.g., filter or spectroscope)
228  DF  .~.~> Integrating sphere
229  DF  .~.~> Light valve (e.g., iris diaphragm) {3}
578.1  DF  .~.~> Plural light sources or optical paths
234  DF  .~.~> Means for moving optical system {1}
237 R  DF  .~.~> Hoods, grating, baffles, diaphragms, masks {1}

DEFINITION

Classification: 250/216

(under subclass 200) Subject matter having means for illuminating the photoelectric cell.

(1) Note. The means for illuminating the photoelectric cell should be significant, and if conventional and claimed by name only, is not found in this and indented subclasses.

(2) Note. The means for illuminating the photocell need not be a specific light source, but may be the ambient illumination.