US PATENT SUBCLASS 209 / 234
.~ Combined type

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

233  DF  SIFTING {16}
234.~ Combined type

DEFINITION

Classification: 209/234

(under subclass 233) Sifting devices including a plurality of sifters of different general types, but not mere duplications of a single type.