US PATENT SUBCLASS 74 / *
.~.~.~ Single spur gear

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

640  DF  GEARING {31}
325  DF  .~ Interchangeably locked {11}
*  DD  .~.~ Longitudinally slidable {5}
*.~.~.~ Single spur gear {1}
348  DF  .~.~.~.~> Tumbler and cone {1}