US PATENT SUBCLASS 73 / 54.32
.~.~.~.~ By measuring an opposed drag force

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

53.01  DF  LIQUID ANALYSIS OR ANALYSIS OF THE SUSPENSION OF SOLIDS IN A LIQUID {15}
54.01  DF  .~ Viscosity {11}
54.23  DF  .~.~ Force reactance to member driven therein {5}
54.28  DF  .~.~.~ Rotationally driven member {4}
54.32.~.~.~.~ By measuring an opposed drag force {2}
54.33  DF  .~.~.~.~.~> By measuring angular displacement
54.34  DF  .~.~.~.~.~> By measuring a counterbalance or restoring force

DEFINITION

Classification: 73/54.32

By measuring an opposed drag force:

(under subclass 54.28) Subject matter wherein the determination is made by measuring a force exerted on a secondary member due to a viscous drag force.