US PATENT SUBCLASS 219 / 448.14
.~.~.~.~.~.~ Using thermistor-type sensor

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}
443.1  DF  .~.~ Exposed horizontal planar support surface for material to be heated (e.g., hot plate, etc.) {13}
446.1  DF  .~.~.~ Having sensor {2}
448.11  DF  .~.~.~.~ Responsive to temperature {4}
448.13  DF  .~.~.~.~.~ Of material (e.g., food, a cooking vessel, etc.) {3}
448.14.~.~.~.~.~.~ Using thermistor-type sensor

DEFINITION

Classification: 219/448.14

Using thermistor-type sensor:

(under subclass 448.13) Subject matter wherein the temperature sensor utilizes a semiconductor whose electrical resistance varies sharply in a known manner with temperature to detect the temperature of the material.