US PATENT SUBCLASS 81 / 57.44
.~.~.~ Fluid

Current as of: June, 1999
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81 /   HD   TOOLS

52  DF  WRENCH, SCREWDRIVER, OR DRIVER THEREFOR {27}
54  DF  .~ Machine {10}
57.42  DF  .~.~ Direct drive {4}
57.44.~.~.~ Fluid

DEFINITION

Classification: 81/57.44

(under subclass 57.42) Wrench or screwdriver wherein the drive means is motivated by a fluid force.