US PATENT SUBCLASS 209 / *
.~ Movable bed

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

422  DF  STRATIFIERS {6}
*.~ Movable bed {2}
479  DF  .~.~> Chutes, tables, and receptacles {2}
482  DF  .~.~> Drums