US PATENT SUBCLASS 209 / 420
.~.~.~ Portable

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

233  DF  SIFTING {16}
363  DF  .~ Elements {7}
409  DF  .~.~ Supports {7}
420.~.~.~ Portable {1}
421  DF  .~.~.~.~> Vehicles

DEFINITION

Classification: 209/420

(under subclass 409) Sifters so mounted or supported as to be movable from place to place other than by manual support.

(1) Note. Devices of this subclass are generally mounted on frames provided with wheels, skids, or equivalent devices or on scows or wheeled vehicles.