US PATENT SUBCLASS 131 / 212.1
.~.~.~.~.~ Smoke direction changing

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}
211  DF  .~.~.~.~ Chamber enclosed tubes or nipples {1}
212.1.~.~.~.~.~ Smoke direction changing {1}
212.2  DF  .~.~.~.~.~.~> Concentric ducts

DEFINITION

Classification: 131/212.1

Smoke direction changing:

(under subclass 322) Subject matter in which the path of the smoke through the smoking device is altered by (1) at least two tubes or nipples either extending into the trap chamber or overlapping one another, or (2) the position of a single tube or nipple with respect to the smoking passage.