US PATENT SUBCLASS 172 / 180
.~.~.~ Rolling precedes non-rolling (same path)

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

133  DF  DIVERSE TOOLS {29}
174  DF  .~ Rolling and non-rolling {2}
175  DF  .~.~ Following same path {5}
180.~.~.~ Rolling precedes non-rolling (same path) {1}
181  DF  .~.~.~.~> Concave furrowing disk with trailing tool

DEFINITION

Classification: 172/180

(under subclass 175) Apparatus in which the rolling implement is located ahead of the nonrolling implement.

SEE OR SEARCH THIS CLASS, SUBCLASS:

164, for a rolling jointer and plow.

166, for a rolling colter and diverse tool.