US PATENT SUBCLASS 219 / 444.1
.~.~.~ Material is an electronic semiconductor device

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}
444.1.~.~.~ Material is an electronic semiconductor device

DEFINITION

Classification: 219/444.1

Material is an electronic semiconductor device:

(under subclass 443.1) Subject matter wherein the exposed horizontal planar support surface is intended to support, for heating, apparatus formed of a substance whose electrical conductivity at normal temperature is between that of a conductor and an insulator to control electron flow.