US PATENT SUBCLASS 432 / 213
.~.~ Having distinct burner units

Current as of: June, 1999
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432 /   HD   HEATING

120  DF  WORK CHAMBER HAVING HEATING MEANS {12}
212  DF  .~ Tortuous, branched or baffled heating flue means within or along chamber wall {1}
213.~.~ Having distinct burner units

DEFINITION

Classification: 432/213

(under subclass 212) Apparatus including distinct conduits each having its own source of combustion products.