US PATENT SUBCLASS 73 / 308
.~.~.~.~ Electric

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

290 R  DF  LIQUID LEVEL OR DEPTH GAUGE {13}
305  DF  .~ Float {12}
306  DF  .~.~ Combined {1}
307  DF  .~.~.~ With warning signal or alarm {1}
308.~.~.~.~ Electric

DEFINITION

Classification: 73/308

(under subclass 307) Combinations wherein the signal is electrically operated.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers,

84, for float operated switches, per se.

340, Communications: Electrical,

618+, for nonquantitative alarms responsive to liquid level.