US PATENT SUBCLASS 131 / 209
.~.~.~.~ Spiral passage

Current as of: June, 1999
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131 /   HD   TOBACCO

329  DF  TOBACCO USERS' APPLIANCE {8}
330  DF  .~ Device used for smoking {21}
200  DF  .~.~ Smoke treating {1}
201  DF  .~.~.~ Material separator and trap {7}
209.~.~.~.~ Spiral passage

DEFINITION

Classification: 131/209

(under subclass 201) Smoking devices having a spiral passage for the smoke.

(1) Note. Compare this class, subclass 217.

SEE OR SEARCH THIS CLASS, SUBCLASS:

339, for cigars or cigarettes having spiral passages for the smoke.