US PATENT SUBCLASS 73 / 744
.~ Piston

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

700  DF  FLUID PRESSURE GAUGE {20}
744.~ Piston {1}
745  DF  .~.~> With electrical readout {1}

DEFINITION

Classification: 73/744

Piston:

(under subclass 700) Subject matter wherein the pressure being measured displaces a movable wall.

SEE OR SEARCH CLASS

92, Expansible Chamber Devices, for a piston and cylinder-type expansible chamber device and particularly

172+, for piston, per se.