US PATENT SUBCLASS 81 / 183
.~.~ Roller clutch

Current as of: June, 1999
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81 /   HD   TOOLS

52  DF  WRENCH, SCREWDRIVER, OR DRIVER THEREFOR {27}
180.1  DF  .~ Attachment, or including adjunct or replaceable portion {6}
183.~.~ Roller clutch

DEFINITION

Classification: 81/183

Rollers added to wrench-jaws and causing a clutch-grip on the work.