US PATENT SUBCLASS 434 / 337
.~.~.~ Light detector

Current as of: June, 1999
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434 /   HD   EDUCATION AND DEMONSTRATION

322  DF  QUESTION OR PROBLEM ELICITING RESPONSE {8}
327  DF  .~ Correctness of response indicated to examine by self-operating or examinee actuated means {12}
335  DF  .~.~ By means including electrical component {8}
337.~.~.~ Light detector

DEFINITION

Classification: 434/337

Light detector:

(under subclass 335) Subject matter wherein the examining means includes a light detecting means (e.g.., photocell, etc.).

SEE OR SEARCH THIS CLASS, SUBCLASS:

325, for light detectors in examining means which also have an image projector.