US PATENT SUBCLASS 340 / 618
.~.~.~.~ Liquid


Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
540  DF  .~ Specific condition {18}
603  DF  .~.~ Fluent material {7}
612  DF  .~.~.~ Material level {6}
618.~.~.~.~ Liquid {5}
619  DF  .~.~.~.~.~> Optical sensor
620  DF  .~.~.~.~.~> Electrode probe
621  DF  .~.~.~.~.~> Having sonic sensor
622  DF  .~.~.~.~.~> Having heat sensor
623  DF  .~.~.~.~.~> Float sensor {2}


DEFINITION

Classification: 340/618

Liquid:

(under subclass 612) Subject matter wherein the fluent material is a liquid.

SEE OR SEARCH CLASS

73, Measuring and Testing,

290+, for liquid level measurement.

137, Fluid Handling,

392, for a liquid level responsive system sensing an electrical characteristic.