US PATENT SUBCLASS 356 / 21
.~.~ Object size or distance known

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

3  DF  RANGE OR REMOTE DISTANCE FINDING {9}
20  DF  .~ External basis type {1}
21.~.~ Object size or distance known {1}
22  DF  .~.~.~> With displaced images

DEFINITION

Classification: 356/21

(under subclass 20) Subject matter where there is an interval of known size (e.g., height of an object) at a remote point, the distance to which point is to be determined; or where the distance to a remote point is known and the size of some interval at the remote point is to be determined.