US PATENT SUBCLASS 73 / 309
.~.~ Buoyancy type

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}
309.~.~ Buoyancy type

DEFINITION

Classification: 73/309

(under subclass 305) Gauges wherein the level or depth is determined by measuring the buoyant effort exerted by the liquid upon a buoyant body.

SEE OR SEARCH CLASS

177, Weighing Scales,

207, for a weigher operated by the displacement of liquid.