US PATENT SUBCLASS 33 / 366.21
.~.~.~.~ Having resistive or contact circuit control element

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

300  DF  INDICATOR OF DIRECTION OF FORCE TRAVERSING NATURAL MEDIA {23}
365  DF  .~ Level or plumb, terrestrial gravitation responsive {9}
366.11  DF  .~.~ Electrically actuated signal or indicator {9}
366.15  DF  .~.~.~ Fluent sensor {4}
366.21.~.~.~.~ Having resistive or contact circuit control element {1}
366.22  DF  .~.~.~.~.~> By multiple circuit paths through conductive fluid

DEFINITION

Classification: 33/366.21

Having resistive or contact circuit control element:

(under subclass 366.15) Subject matter wherein the fluid material (1) forms a resistive component of, or (2) completes the indicator controlling electric circuit.

SEE OR SEARCH CLASS

200, Electricity, Circuit Makers and Breakers.

338, Electrical Resistors,

80+, for a mechanically variable resistor having a liquid resistance element.