US PATENT SUBCLASS 74 / 320
.~.~ Progressive

Current as of: June, 1999
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74 /   HD   MACHINE ELEMENT OR MECHANISM

640  DF  GEARING {31}
319  DF  .~ Alternating rotary {3}
320.~.~ Progressive

DEFINITION

Classification: 74/320

(under subclass 319) Gearing, in which the driven element is rotated a greater amount in one direction than in the other.