US Patent Class 34
DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS-- Main Headings




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Current as of: June, 1999
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CLASS NOTES
245  DF  MATERIAL TREATED BY ELECTROMAGNETIC ENERGY {8}
279  DF  MATERIAL TREATED BY ACOUSTIC ENERGY
280  DF  FEATHER TREATING {1}
282  DF  PROCESS {24}
523  DF  APPARATUS {40}
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DIGEST
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DIG 1  DF  Absorbents and adsorbents