US PATENT SUBCLASS 219 / 488
.~.~ With voltage limitation, conversion, or adapting means


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

200  DF  HEATING DEVICES {14}
482  DF  .~ With power supply and voltage or current regulation or current control means {4}
488.~.~ With voltage limitation, conversion, or adapting means


DEFINITION

Classification: 219/488

(under subclass 482) Subject matter including means whereby a supply voltage of a first value may be maintained within given limits, may be converted to a second different value or means whereby a heating device adapted to operate on an alternating voltage may be adapted to operate on a D.C. voltage or vice versa.

SEE OR SEARCH THIS CLASS, SUBCLASS:

490+, for automatic voltage or current regulating means for electric heaters in general.

SEE OR SEARCH CLASS

323, Electricity: Power Supply or Regulation Systems, appropriate subclasses for current or voltage limiters.

363, Electric Power Conversion Systems, appropriate subclass for electric power, voltage, phase or frequency conversion systems.