US PATENT SUBCLASS 338 / 90
.~.~ With slab or card-type resistance element

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

68  DF  MECHANICALLY VARIABLE (E.G., RHEOSTAT) {24}
89  DF  .~ Mathematical function (e.g., sine-cosine potentiometer) {2}
90.~.~ With slab or card-type resistance element

DEFINITION

Classification: 338/90

(under subclass 89) Subject matter wherein the resistance element is formed as a surface having significant width as well as length, together with a contactor relatively movable not only lengthwise but crosswise over the surface of the element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

116, for electric motor driven resistors.

SEE OR SEARCH CLASS

363, Electric Power Conversion Systems,

140, for impedance type converters.