US PATENT SUBCLASS 74 / 383
.~.~ Screw

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

640  DF  GEARING {31}
380  DF  .~ Pivotally supported {4}
383.~.~ Screw

DEFINITION

Classification: 74/383

(under subclass 380) Screw gearing,.