US PATENT SUBCLASS 131 / 173
.~.~ Smoke washing type

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}
173.~.~ Smoke washing type

DEFINITION

Classification: 131/173

(under subclass 330) Smoking devices wherein the smoke is passed through a liquid, usually for purposes of cooling or washing the smoke. Devices commonly known as hookahs are here included.

SEE OR SEARCH THIS CLASS, SUBCLASS:

331+, for smoke treating means.