US PATENT SUBCLASS 392 / 439
.~.~.~.~.~ Nonmetallic panel

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}
435  DF  .~.~.~ With heat radiating panel {2}
438  DF  .~.~.~.~ Heating element formed as coating on radiating panel surface {1}
439.~.~.~.~.~ Nonmetallic panel

DEFINITION

Classification: 392/439

Nonmetallic panel:

(under subclass 438) Subject matter wherein the heating element is coated on a nonmetallic panel.