US PATENT SUBCLASS 81 / 468
.~.~ With marking mechanism

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}
468.~.~ With marking mechanism

DEFINITION

Classification: 81/468

With marking mechanism:

(under subclass 467) Wrench or screwdriver provided with a mechanism intended to mark the work in a manner which is detectable by an observer when the selected torque is applied to the work.