US PATENT SUBCLASS 366 / 321
.~.~.~ Opposite pitch

Current as of: June, 1999
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366 /   HD   AGITATING

241  DF  STIRRER WITHIN STATIONARY MIXING CHAMBER {10}
279  DF  .~ Rotatable stirrer {15}
318  DF  .~.~ Screw-type stirrer {6}
321.~.~.~ Opposite pitch

DEFINITION

Classification: 366/321

Opposite pitch:

(under subclass 318) Subject matter wherein the stirrer includes a helical ribbon portion of opposite pitch.