US PATENT SUBCLASS 373 / 5
.~ Resistance

Current as of: June, 1999
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373 /   HD   INDUSTRIAL ELECTRIC HEATING FURNACES

1  DF  PLURAL DIVERSE HEATING MEANS {3}
5.~ Resistance {1}
6  DF  .~.~> With induction

DEFINITION

Classification: 373/5

Resistance:

(under subclass 1) Subject matter wherein one of the heating elements is a means to develop heat by the passage of current through a material, or device having the property of electrical resistance.

SEE OR SEARCH THIS CLASS, SUBCLASS:

3, for resistance heating elements combined with arc furnaces.

109+, for resistance furnace details, per se.

SEE OR SEARCH CLASS

219, Electric Heating,

200+, for electric resistance heating, per se.