US PATENT SUBCLASS 73 / 1.45
.~.~.~ Using optical sensor or element

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

1.01  DF  INSTRUMENT PROVING OR CALIBRATING {13}
1.42  DF  .~ Timing apparatus (e.g., fuse, camera, or shutter) {2}
1.43  DF  .~.~ Chronometer (e.g., clock, watch, or watch unbalance) {5}
1.45.~.~.~ Using optical sensor or element {2}
1.46  DF  .~.~.~.~> With sound sensor
1.47  DF  .~.~.~.~> Resilient element

DEFINITION

Classification: 73/1.45

Using optical sensor or element:

(under subclass 1.43) Subject matter wherein either (a) the apparatus for proving or calibrating the chronometer or (b) the chronometer being proven or calibrated includes a means whose optical characteristic changes in response to a stimulus.

SEE OR SEARCH CLASS

250, Radiant Energy, appropriate subclasses for an optical sensor, per se.