US PATENT SUBCLASS 219 / 417
.~.~.~ With plurality of separate heating units

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

200  DF  HEATING DEVICES {14}
385  DF  .~ Combined with container, enclosure, or support for material to be heated {12}
415  DF  .~.~ Deep well {4}
417.~.~.~ With plurality of separate heating units

DEFINITION

Classification: 219/417

(under subclass 415) Subject matter including at least two or more separate heating units.

SEE OR SEARCH THIS CLASS, SUBCLASS:

476+, for plural separate heater devices in general.