US PATENT SUBCLASS 297 / 180.12
.~ Electric heating element

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297 /   HD   CHAIRS AND SEATS

180.1  DF  WITH HEAT EXCHANGER OR MEANS TO PROVIDE FLUID OR VAPOR TREATMENT {5}
180.12.~ Electric heating element

DEFINITION

Classification: 297/180.12

Electric heating element:

(under subclass 180.1) Device in which the heating means is an element which operates to convert electrical energy into heat.