US PATENT SUBCLASS 73 / 1.31
.~.~ With liquid level monitor or timer

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

1.01  DF  INSTRUMENT PROVING OR CALIBRATING {13}
1.16  DF  .~ Volume of flow, speed of flow, volume rate of flow, or mass rate of flow {12}
1.31.~.~ With liquid level monitor or timer {1}
1.32  DF  .~.~.~> Prover bell

DEFINITION

Classification: 73/1.31

With liquid level monitor or timer:

(under subclass 1.16) Subject matter including (a) an apparatus for determining a predetermined level or depth of a body of liquid or sensing a predetermined level or depth of body of liquid or (b) an apparatus for measuring the time for

travel of a fluid from one point to another.

SEE OR SEARCH THIS CLASS, SUBCLASS:

1.73+, for calibrating liquid level measuring devices.

290+, for liquid level measuring, per se.