US PATENT SUBCLASS 131 / 195
.~.~.~ Cooling air passages

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}
194  DF  .~.~ Heat exchanging and/or insulating {2}
195.~.~.~ Cooling air passages

DEFINITION

Classification: 131/195

(under subclass 194) Smoking devices provided with passages for air to flow in heat exchange relation with the container for the burning charge and/or with the smoke conducting passages.

SEE OR SEARCH THIS CLASS, SUBCLASS:

198.1+, for devices having special air inlets to either the burning charge or to the smoke conducting passages.