US PATENT SUBCLASS 219 / 681
.~.~ Convection heating


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

678  DF  MICROWAVE HEATING {15}
680  DF  .~ With diverse-type heating {2}
681.~.~ Convection heating {3}
682  DF  .~.~.~> Steam generating
683  DF  .~.~.~> Gas burner
684  DF  .~.~.~> Tunnel type


DEFINITION

Classification: 219/681

Convection heating:

(under subclass 680) Subject matter wherein the diverse-type heating is transferring heat to a load by a bodily movement of heated particles of matter.

SEE OR SEARCH THIS CLASS, SUBCLASS:

400, for heat transfer by convection.

757, for an enclosed cavity structure with cooling or ventilation.

SEE OR SEARCH CLASS

126, Stoves and Furnaces,

21+, for ventilated ovens.