US PATENT SUBCLASS 338 / 39
.~.~ Piston

Current as of: June, 1999
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338 /   HD   ELECTRICAL RESISTORS

13  DF  RESISTANCE VALUE RESPONSIVE TO A CONDITION {10}
36  DF  .~ Fluid- or gas pressure-actuated {6}
39.~.~ Piston

DEFINITION

Classification: 338/39

(under subclass 36) Subject matter wherein the resistor actuator is a piston or plunger.

SEE OR SEARCH THIS CLASS, SUBCLASS:

33, for a resistor actuated by a float.

SEE OR SEARCH CLASS

73, Measuring and Testing,

746, for fluid pressure gauges having a piston as the pressure responsive element.