US PATENT SUBCLASS 172 / 123
.~.~ Rotary driven tool

Current as of: June, 1999
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172 /   HD   EARTH WORKING

35  DF  WITH DRIVE MEANS FOR TOOL OR CLEANER {37}
118  DF  .~ Tool driven about axis transverse to draft line {5}
123.~.~ Rotary driven tool

DEFINITION

Classification: 172/123

(under subclass 118) Apparatus in which the earth working element is rotatably driven about an axis extending transversely to the direction of travel.