US PATENT SUBCLASS 356 / 9
.~ Base line instrument (i.e., base is a part of instrument)

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

3  DF  RANGE OR REMOTE DISTANCE FINDING {9}
9.~ Base line instrument (i.e., base is a part of instrument) {8}
10  DF  .~.~> With filter or light valve
11  DF  .~.~> Range finder combined with height finder
12  DF  .~.~> Stereoscopic {2}
15  DF  .~.~> Length of base line variable
16  DF  .~.~> Image displaced by moving refracting element
17  DF  .~.~> Image displaced by rotating reflecting element
18  DF  .~.~> With mounting, supporting, adjusting, or folding structure
19  DF  .~.~> Prism structure for determining coincidence

DEFINITION

Classification: 356/9

(under subclass 3) Subject matter wherein the range or height finder includes a base line as a part of the instrument with plural lines of sight directed from the extremeties of the base line to the point whose range is to be measured, at least one of the lines of sight being deviated.