US PATENT SUBCLASS 73 / 1.66
.~.~ 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}
1.66.~.~ Varying {1}
1.67  DF  .~.~.~> Using or containing liquid

DEFINITION

Classification: 73/1.66

Varying:

(under subclass 1.57) Subject matter including means providing a standard or the known pressure which varies during the proving or calibrating of either the fluid pressure measuring device or the fluid pressure responsive device.