US PATENT SUBCLASS 73 / 713
.~ With float

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

700  DF  FLUID PRESSURE GAUGE {20}
713.~ With float

DEFINITION

Classification: 73/713

With float:

(under subclass 700) Subject matter wherein communicating liquid columns are subjected to pressure and the difference in levels of the columns is indicated with the aid of one or more devices that stays on the surface of the liquid.