US PATENT SUBCLASS 221 / 146
.~.~.~.~ Stack or chimney

Current as of: June, 1999
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221 /   HD   ARTICLE DISPENSING

135  DF  WITH ARTICLE TREATMENT {2}
136  DF  .~ With igniting means {3}
143  DF  .~.~ Electrical {2}
144  DF  .~.~.~ Including vacuum or draft producing means {2}
146.~.~.~.~ Stack or chimney

DEFINITION

Classification: 221/146

(under subclass 144) Devices in which the flow causing means is a tubular flue-like means.