US PATENT SUBCLASS 356 / 390
.~ With two images of single article compared

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

388  DF  BY CONFIGURATION COMPARISON {8}
390.~ With two images of single article compared

DEFINITION

Classification: 356/390

With two images of single article compared:

(under subclass 388) Subject matter including optical elements to permit the simultaneous viewing of two portions of a single configuration, such as opposite sides of a threaded screw, or two images of the same portion of a configuration one usually being inverted, for comparison thereof.