US PATENT SUBCLASS 34 / 263
.~.~ Having pressure reducing means

Current as of: June, 1999
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34 /   HD   DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS

245  DF  MATERIAL TREATED BY ELECTROMAGNETIC ENERGY {8}
259  DF  .~ Microwave energy {5}
263.~.~ Having pressure reducing means

DEFINITION

Classification: 34/263

Having pressure reducing means:

(under subclass 259) Subject matter including means to establish a vacuum or suction.