US PATENT SUBCLASS 81 / 57.31
.~.~.~ Common axis drive

Current as of: June, 1999
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81 /   HD   TOOLS

52  DF  WRENCH, SCREWDRIVER, OR DRIVER THEREFOR {27}
54  DF  .~ Machine {10}
57  DF  .~.~ Gear-operated {9}
57.31.~.~.~ Common axis drive

DEFINITION

Classification: 81/57.31

(under subclass 57) Wrench or screwdriver wherein the drive means and the driven means are on a common axis.