US PATENT SUBCLASS 338 / 297
.~ Flat spiral winding

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338 /   HD   ELECTRICAL RESISTORS

296  DF  HELICAL OR WOUND RESISTANCE ELEMENT {7}
297.~ Flat spiral winding

DEFINITION

Classification: 338/297

(under subclass 296) Subject matter wherein the resistance element is formed as a flat spiral lying in one plane.

SEE OR SEARCH THIS CLASS, SUBCLASS:

147, for contact following helical resistors, whose elements are formed as a flat spiral.

293+, for zigzag or sinuous resistors whose elements lie in one plane.

301, for helical or wound resistors whose elements are coiled on a flat or ribbon base.

SEE OR SEARCH CLASS 219, Electric Heating,

540, for radiating plate electric heaters.

336, Inductor Devices,

232, for planar type inductance coils.