US PATENT SUBCLASS 81 / 475
.~.~.~ Having complementary formations

Current as of: June, 1999
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81 /   HD   TOOLS

52  DF  WRENCH, SCREWDRIVER, OR DRIVER THEREFOR {27}
467  DF  .~ Responsive to torque on work {7}
473  DF  .~.~ Rotatable, coaxial, clutching components {3}
475.~.~.~ Having complementary formations

DEFINITION

Classification: 81/475

Having complementary formations:

(under subclass 473) Wrench or screwdriver wherein one of the rotating components has either projections or apertures located on its coacting surface for engaging corresponding apertures or projections formed on the coacting surface of the other component.