US PATENT SUBCLASS 131 / 301
.~.~ Including means to create a vacuum

Current as of: June, 1999
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131 /   HD   TOBACCO

290  DF  TOBACCO TREATMENT {8}
300  DF  .~ With fluid or fluent material {6}
301.~.~ Including means to create a vacuum

DEFINITION

Classification: 131/301

Including means to create a vacuum:

(under subclass 300) Process or apparatus including means to create a negative atmospheric pressure.