US PATENT SUBCLASS 392 / 433
.~.~.~ With exposed radiant heating element

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

*  DD  HEATING DEVICES (CLASS 219 SUBCLASS 200) {11}
407  DF  .~ Radiant heater {10}
432  DF  .~.~ Radiant extended surface type heater {2}
433.~.~.~ With exposed radiant heating element {1}
434  DF  .~.~.~.~> On ceramic support structure

DEFINITION

Classification: 392/433

With exposed radiant heating element:

(under subclass 432) Subject matter wherein the heating element lays open to the atmosphere.