US PATENT SUBCLASS 172 / 166
.~.~ Rolling colter

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

133  DF  DIVERSE TOOLS {29}
165  DF  .~ Including colter {1}
166.~.~ Rolling colter

DEFINITION

Classification: 172/166

(under subclass 165) Apparatus in which the colter is of the rolling or rotating type.