US PATENT SUBCLASS 73 / 1.61
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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}
1.61.~.~.~ Span

DEFINITION

Classification: 73/1.61

Span:

(under subclass 1.59) Subject matter wherein the pressure responsive device is tested or calibrated for accuracy at at least two pressures.