US PATENT SUBCLASS 356 / 392
.~.~ For comparison with master or desired configuration

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

388  DF  BY CONFIGURATION COMPARISON {8}
391  DF  .~ With projection on viewing screen {1}
392.~.~ For comparison with master or desired configuration {1}
393  DF  .~.~.~> Having master or desired configuration projection

DEFINITION

Classification: 356/392

For comparison with master or desired configuration:

(under subclass 391) Subject matter including means to simultaneously view and compare the configuration and a standard configuration of the same type, or a pattern showing a desired or standard shape, or another configuration of the same type.

(1) Note. In this subclass a representation of the master is usually a part of or adjacent the viewing screen, and an image of the test configuration is projected thereon; while in indented subclass 393 below, an image of the master and usually also an image of the test configuration are projected on the viewing screw.