US PATENT SUBCLASS 110 / 288
.~.~.~ And forced air supply

Current as of: June, 1999
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110 /   HD   FURNACES

267  DF  INCLUDING MEANS TO FEED SOLID FUEL {4}
286  DF  .~ Power driven {2}
287  DF  .~.~ Having circular grate {1}
288.~.~.~ And forced air supply

DEFINITION

Classification: 110/288

And forced air supply:

(under subclass 287) Apparatus further provided with air fan impeller means for feeding air to the circular grate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

348, for process of fluid feed.