US PATENT SUBCLASS 33 / 837
.~.~ Fluid actuated indicator

Current as of: June, 1999
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33 /   HD   GEOMETRICAL INSTRUMENTS

700  DF  DISTANCE MEASURING {13}
832  DF  .~ Single contact with a work engaging support {3}
837.~.~ Fluid actuated indicator

DEFINITION

Classification: 33/837

Fluid actuated indicator:

(under subclass 832) Subject matter wherein the contacting member is activated by a liquid or gas in a passageway for measuring the movement of the member.