US PATENT SUBCLASS 219 / 418
.~.~.~ With adjustable position heating unit or 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}
418.~.~.~ With adjustable position heating unit or units


DEFINITION

Classification: 219/418

(under subclass 415) Subject matter including means whereby at least one heating unit of the device may be adjusted in position relative to the well structure.