US PATENT SUBCLASS 356 / 254
.~.~ Two or more deflections

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

247  DF  FIDUCIAL INSTRUMENTS {3}
253  DF  .~ Deflection of line of sight {2}
254.~.~ Two or more deflections

DEFINITION

Classification: 356/254

(under subclass 253) Subject matter where there are two or more deflections of the line of sight.

SEE OR SEARCH CLASS

359, Optics: Systems (Including Communication) and

Elements,

402+, for periscopes including a compound optical system, and subclasses 857+ for systems for viewing a remote object by means of plural reflections.