US PATENT SUBCLASS 131 / 215.1
.~.~.~.~ With valve in smoke path or removable, external passage closure

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}
215.1.~.~.~.~ With valve in smoke path or removable, external passage closure {2}
215.2  DF  .~.~.~.~.~> With filter
215.3  DF  .~.~.~.~.~> Valve

DEFINITION

Classification: 131/215.1

With valve in smoke path or removable, external passage closure:

(under subclass 201) Subject matter wherein the smoking device (1) is provided with a smoke regulating means in a smoke conducting passageway thereof, or (2) has a separate, detachable plug, cap, or cover for a passageway (in addition to any tobacco receiving inlet or mouthpiece outlet passageway) which communicates with the smoke conducting passageway and extends to the exterior of the smoking device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

206, and 223, for other valve or external passage closures for a smoking device.