US PATENT SUBCLASS 209 / 502
.~.~.~ Pneumatic

Current as of: June, 1999
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209 /   HD   CLASSIFYING, SEPARATING, AND ASSORTING SOLIDS

422  DF  STRATIFIERS {6}
484  DF  .~ Elements {9}
*  DD  .~.~ Fluid supply {2}
502.~.~.~ Pneumatic

DEFINITION

Classification: 209/502

(under subclass 484) Special devices for the supply or control of gaseous fluid to stratifiers which are not elsewhere classifiable and stratifier combinations including special gases supply and control means.