US PATENT SUBCLASS 219 / 666
.~.~.~.~.~ With tuning

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

600  DF  INDUCTIVE HEATING {7}
660  DF  .~ With power supply system {3}
661  DF  .~.~ Power switching {4}
663  DF  .~.~.~ Condition responsive {2}
665  DF  .~.~.~.~ Load sensing {2}
666.~.~.~.~.~ With tuning

DEFINITION

Classification: 219/666

With tuning:

(under subclass 665) Subject matter wherein the sensing device matches electrical parameters of an input energy signal with that of an impedance of the load.