US PATENT SUBCLASS 73 / 523
.~.~ Expansible chamber devices

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

488  DF  SPEED, VELOCITY, OR ACCELERATION {29}
521  DF  .~ Fluid {4}
523.~.~ Expansible chamber devices

DEFINITION

Classification: 73/523

(under subclass 521) Apparatus including a fluid container comprising one or more walls which are movable with respect to others to vary the volume of the container.

SEE OR SEARCH THIS CLASS, SUBCLASS:

502, for devices in which the expansible chamber is part of an externally connected gauge.