US PATENT SUBCLASS 432 / 102
.~ Having heat emitting tube or flue within or traversing shaft chamber

Current as of: June, 1999
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432 /   HD   HEATING

95  DF  SHAFT TYPE {2}
102.~ Having heat emitting tube or flue within or traversing shaft chamber

DEFINITION

Classification: 432/102

(under subclass 95) Apparatus including a heating surface in the form of a tube or flue located within the chamber and across which the work flows.