US PATENT SUBCLASS 73 / 37.9
.~.~ Internal gauging

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

37  DF  WITH FLUID PRESSURE {8}
37.5  DF  .~ Dimension, shape, or size {3}
37.9.~.~ Internal gauging

DEFINITION

Classification: 73/37.9

(under subclass 37.5) Subject matter for measurement of size of bores and similar concave openings in specimens.