US PATENT SUBCLASS 73 / 820
.~.~.~ Fluid displacement provides indication

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

760  DF  SPECIMEN STRESS OR STRAIN, OR TESTING BY STRESS OR STRAIN APPLICATION {12}
788  DF  .~ By loading of specimen (e.g., strength of material test) {16}
818  DF  .~.~ Compressional {7}
820.~.~.~ Fluid displacement provides indication

DEFINITION

Classification: 73/820

Fluid displacement provides indication:

(under subclass 818) Subject matter wherein the parameter to be indicated controls the position of a fluid volume which position is calibrated so as to provide the desired parameter indication.