US PATENT SUBCLASS 356 / 13
.~.~.~ Ortho-pseudo type

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

3  DF  RANGE OR REMOTE DISTANCE FINDING {9}
9  DF  .~ Base line instrument (i.e., base is a part of instrument) {8}
12  DF  .~.~ Stereoscopic {2}
13.~.~.~ Ortho-pseudo type

DEFINITION

Classification: 356/13

(under subclass 12) Subject matter where the observer sees an image in true perspective and also one in reverse perspective.