US PATENT SUBCLASS 356 / 10
.~.~ With filter or light valve

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}
10.~.~ With filter or light valve

DEFINITION

Classification: 356/10

(under subclass 9) Subject matter wherein filters or light valves are employed to aid the eye as in determining coincidence of the right and left images.

SEE OR SEARCH CLASS

359, Optics: Systems (Including Communication) and Elements,

227+, for diaphragms and shutters, and subclasses 885+ for filters of the color and neutral density type.