US PATENT SUBCLASS 219 / 489
.~.~ Combined manual and automatic regulating or control means

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

200  DF  HEATING DEVICES {14}
482  DF  .~ With power supply and voltage or current regulation or current control means {4}
489.~.~ Combined manual and automatic regulating or control means

DEFINITION

Classification: 219/489

(under subclass 482) Subject matter consisting of at least one means operative by hand at the will of an operator and one or more additional self-acting means operative upon the occurrence of a predetermined condition or set of conditions within the heating device or heated material.

SEE OR SEARCH CLASS

323, Electricity: Power Supply or Regulation Systems,

234, 298 for output responsive regulators.