US PATENT SUBCLASS 392 / 481
.~.~.~.~ Coiled

Current as of: June, 1999
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392 /   HD   ELECTRIC RESISTANCE HEATING DEVICES

*  DD  HEATING DEVICES (CLASS 219 SUBCLASS 200) {11}
465  DF  .~ Continuous flow type fluid heater {12}
479  DF  .~.~ Externally heated line connected section {4}
480  DF  .~.~.~ Pipe or tube forms flow path {1}
481.~.~.~.~ Coiled

DEFINITION

Classification: 392/481

Coiled:

(under subclass 480) Subject matter wherein the tube or pipe is in the form of a spiral or helix.

SEE OR SEARCH THIS CLASS, SUBCLASS:

320, for tube or pipe forms flow path.

396+, for continuous flow line connected vaporizer.

461, for externally mounted circulation type heater.

468+, for pipeline tracing.

472, for flexible hose.

480+, for pipe or tube forms flow path. SEE OR SEARCH CLASS

99, Foods and Beverages: Apparatus,

279+, for infusers.

122, Liquid Heaters and Vaporizers,

244, 251 for oil or loop tube.

126, Stoves and Furnaces,

344+, for water heaters.

219, Electric Heating,

535, for specially formed or adapted to fit material to be heated.

222, Dispensing,

146.1+, for heating or cooling means. 239, Fluid Sprinkling, Spraying, and Diffusing,

128+, for heating or cooling means for system or system fluid.