US PATENT SUBCLASS 356 / 253
.~ Deflection of line of sight

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

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

DEFINITION

Classification: 356/253

(under subclass 247) Subject matter where the line of sight is deflected.