US PATENT SUBCLASS 81 / 73
.~ U-crank arm

Current as of: June, 1999
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81 /   HD   TOOLS

52  DF  WRENCH, SCREWDRIVER, OR DRIVER THEREFOR {27}
73.~ U-crank arm

DEFINITION

Classification: 81/73

The operating part has a U-shaped arm similar to the common bit-stock.