US PATENT SUBCLASS 219 / 480
.~.~ Selectively activated


Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

200  DF  HEATING DEVICES {14}
476  DF  .~ Plural separate heating devices {4}
480.~.~ Selectively activated


DEFINITION

Classification: 219/480

(under subclass 476) Subject matter including means whereby the separate heating devices may be selectively activated either automatically or at the will of an operator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

486+, for means for selectively or sequentially controlling plural heater resistance elements in general.