US PATENT SUBCLASS 73 / 1.64
.~.~.~.~ Varying

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

1.01  DF  INSTRUMENT PROVING OR CALIBRATING {13}
1.57  DF  .~ Fluid pressure {7}
1.59  DF  .~.~ With signal correction or processing {3}
1.63  DF  .~.~.~ With reference source or attachment therefor {1}
1.64.~.~.~.~ Varying

DEFINITION

Classification: 73/1.64

Varying:

(under subclass 1.63) Subject matter wherein the provided standard or the known pressure varies during the proving or calibrating of the fluid pressure measuring or the fluid pressure responsive device.