US PATENT SUBCLASS 110 / 316
.~ Grateless

Current as of: June, 1999
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110 /   HD   FURNACES

315  DF  DOWNDRAFT {1}
316.~ Grateless

DEFINITION

Classification: 110/316

Grateless:

(under subclass 315) Apparatus wherein the fuel support means is the solid unperforated bottom of the combustion chamber.