US PATENT SUBCLASS 219 / 442
.~.~.~.~ Adjustable

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}
438  DF  .~.~ With vessel {3}
441  DF  .~.~.~ With temperature or current control means {1}
442.~.~.~.~ Adjustable

DEFINITION

Classification: 219/442

(under subclass 441) Subject matter including significant apparatus whereby the temperature control means may be adjusted between predetermined limits.

SEE OR SEARCH THIS CLASS, SUBCLASS:

494+, for automatic heater control means in general of the thermally responsive type.