US PATENT SUBCLASS 219 / 413
.~.~.~.~ Automatically responsive to condition of heating area

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}
391  DF  .~.~ Oven type {12}
412  DF  .~.~.~ With current or voltage control or regulating means {1}
413.~.~.~.~ Automatically responsive to condition of heating area

DEFINITION

Classification: 219/413

(under subclass 412) Subject matter comprising means automatically responsive to the conditions prevailing within the heated area such as the degree of temperature at any given time.

SEE OR SEARCH THIS CLASS, SUBCLASS:

490+, below to complete the search for this subject matter.

SEE OR SEARCH CLASS

99, Foods and Beverages: Apparatus,

325+, for cooking apparatus with automatic control of the heater means.

126, Stoves and Furnaces, 374, for heating vessels with automatic control.

323, Electricity: Power Supply or Regulation Systems, appropriate subclasses for voltage and current regulators in general.

338, Electrical Resistors,

13+, for electrical resistors whose resistance value is responsive to a condition, particularly subclasses 25+ for resistors responsive to ambient temperature.