US PATENT SUBCLASS 373 / 3
.~.~ With resistance

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

1  DF  PLURAL DIVERSE HEATING MEANS {3}
2  DF  .~ Arc {2}
3.~.~ With resistance

DEFINITION

Classification: 373/3

With resistance:

(under subclass 2) Subject matter including 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:

5+, for resistance furnaces combined with heating elements other than an electrical arc.

109+, for resistance furnace details, per se.

SEE OR SEARCH CLASS

219, Electric Heating,

200+, for electric resistance heating, per se.