US PATENT SUBCLASS 209 / 399
.~.~.~.~ Attaching

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

233  DF  SIFTING {16}
363  DF  .~ Elements {7}
392  DF  .~.~ Dress {4}
397  DF  .~.~.~ Perforated sheet {2}
399.~.~.~.~ Attaching

DEFINITION

Classification: 209/399

(under subclass 397) Devices including integral sheets of material perforated with sifting passages and means for attaching said sheets to their supports.

SEE OR SEARCH THIS CLASS, SUBCLASS:

319, and 405, for sifters or frames including attaching means.