392 / | HD | ELECTRIC RESISTANCE HEATING DEVICES |
* | DD | HEATING DEVICES (CLASS 219 SUBCLASS 200) {11} |
407 | DF | .~ Radiant heater {10} |
422 | DF | .~.~ With reflector {4} |
426 | DF | .~.~.~ Bowl-shaped reflector {2} |
427 | .~.~.~.~ Annular heating element concentric with reflector axis |