US PATENT SUBCLASS 392 / 303
.~.~ With vapor generator

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

*  DD  HEATING DEVICES (CLASS 219 SUBCLASS 200) {11}
301  DF  .~ Borehole type {5}
303.~.~ With vapor generator

DEFINITION

Classification: 392/303

With vapor generator:

(under subclass 301) Subject matter wherein the heating device includes means for converting a substance from a solid or liquid to a gaseous state.

SEE OR SEARCH THIS CLASS, SUBCLASS:

324+, for fluid-in-circuit circuit type heater.

342, for vaporization by stored heat.

386+, for vaporizer.