US PATENT SUBCLASS 432 / 101
.~.~ Having distinct combustion products generator chamber

Current as of: June, 1999
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432 /   HD   HEATING

95  DF  SHAFT TYPE {2}
96  DF  .~ Having combustion products generated in or fed to shaft {5}
101.~.~ Having distinct combustion products generator chamber

DEFINITION

Classification: 432/101

(under subclass 96) Apparatus in which the combustion products that contact the work in the work chamber are produced in a chamber distinct from the work chamber.