392 / | HD | ELECTRIC RESISTANCE HEATING DEVICES |
* | DD | HEATING DEVICES (CLASS 219 SUBCLASS 200) {11} |
407 | DF | .~ Radiant heater {10} |
411 | DF | .~.~ Lamp banks (i.e., array of plural lamps) {3} |
412 | .~.~.~ Adjustable lamps position {1} | |
413 | DF | .~.~.~.~> Adjustable individual lamp position |