US PATENT SUBCLASS 131 / 336
.~.~ Air


Current as of: June, 1999
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131 /   HD   TOBACCO

331  DF  SMOKE SEPARATOR OR TREATER {9}
335  DF  .~ By adding constituent to smoke stream {2}
336.~.~ Air


DEFINITION

Classification: 131/336

Air:

(under subclass 335) Product or process wherein the constituent added is air.

SEE OR SEARCH THIS CLASS, SUBCLASS:

198.1+, for air inlets in a cigar holder, cigarette holder, or pipe.

272, for antismoking devices wherein the smoke to air ratio is controlled.