US PATENT SUBCLASS 219 / 471
.~.~.~ With external electrical circuit completion means

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

200  DF  HEATING DEVICES {14}
385  DF  .~ Combined with container, enclosure, or support for material to be heated {12}
469  DF  .~.~ Cylindrical or roller-type support for material to be heated {2}
471.~.~.~ With external electrical circuit completion means

DEFINITION

Classification: 219/471

(under subclass 469) Subject matter including significant details of means whereby an electrical connection is completed between the heating element, or elements, of the device and an external source of current.

SEE OR SEARCH THIS CLASS, SUBCLASS:

507+, for heating devices of general utility under the class definition with significant external circuit completion or disconnection means.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers, appropriate subclasses for the structure of electric switches.

307, Electrical Transmission or Interconnection Systems, appropriate subclasses especially

112+, for switching systems.