US PATENT SUBCLASS 219 / 718
.~.~.~ Having duty cycle

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

678  DF  MICROWAVE HEATING {15}
702  DF  .~ With control system {8}
715  DF  .~.~ Power switching {3}
718.~.~.~ Having duty cycle

DEFINITION

Classification: 219/718

Having duty cycle:

(under subclass 715) Subject matter wherein a device is controlling an intermittently operating microwave heating apparatus from an on-time period to an off-time period.

SEE OR SEARCH THIS CLASS, SUBCLASS:

492+, for an electrical resistance heating device with automatic regulating or control means comprising timing or cycling means.

507+, for an electrical resistance heating device with current connection and/or disconnection means (e.g., switch).

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems,

112+, for switching systems.