US PATENT SUBCLASS 122 / 15
.~ Solid fuel

Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

13.1  DF  STAND BOILER {6}
15.~ Solid fuel

DEFINITION

Classification: 122/15

(under subclass 13) Stand boilers having a solid fuel furnace forming a part of the unitary structure of the stand boiler.

SEE OR SEARCH THIS CLASS, SUBCLASS:

13, for stand boilers modified to be heated by the waste heat of a solid fuel furnace like that of a cooking stove.