US PATENT SUBCLASS 172 / 526
.~.~.~ Plural tools

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

518  DF  ROLLING, ROTATING OR ORBITALLY MOVING TOOL {30}
522  DF  .~ Axis substantially vertical {1}
523  DF  .~.~ With vertically extending teeth {3}
526.~.~.~ Plural tools

DEFINITION

Classification: 172/526

(under subclass 523) Apparatus comprising a plurality of earth working elements each having its axis of rotation substantially vertically disposed.