US PATENT SUBCLASS 219 / 698
.~ Tunnel furnace

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

678  DF  MICROWAVE HEATING {15}
698.~ Tunnel furnace {2}
699  DF  .~.~> With leakage suppression
700  DF  .~.~> Conveyor {1}

DEFINITION

Classification: 219/698

Tunnel furnace:

(under subclass 678) Subject matter wherein an elongated hollow cavity with open ends having microwave conducting interior walls is provided.

(1) Note. A tunnel furnace may also be called a tunnel oven.

SEE OR SEARCH THIS CLASS, SUBCLASS:

684, for a microwave tunnel-type oven with convection heating.