US PATENT SUBCLASS 355 / 38
.~.~.~ Including

Current as of: June, 1999
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355 /   HD   PHOTOCOPYING

18  DF  PROJECTION PRINTING AND COPYING CAMERAS {27}
32  DF  .~ Multicolor picture {2}
35  DF  .~.~ Regulating light intensity or exposure time {3}
38.~.~.~ Including

DEFINITION

Classification: 355/38

(under subclass 35) Subject matter including a photocell or photomultiplier tube and related electrical circuitry to detect the intensity of light in some part of the optical path.

SEE OR SEARCH THIS CLASS, SUBCLASS:

41, for a projection copier in general with identifying, composing, or selecting means including a photocell.

68, for a projection copier in general with a photocell or phototube utilized in the illumination system.