US PATENT SUBCLASS 172 / 158
.~.~ All rolling


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

133  DF  DIVERSE TOOLS {29}
155  DF  .~ Laterally spaced like tools with intermediate diverse tool (A, B, A) {5}
158.~.~ All rolling


DEFINITION

Classification: 172/158

(under subclass 155) Apparatus in which the laterally spaced like earth working elements and the intermediate diverse earth working element are all of the rolling or rotating type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

154, for four laterally spaced tools which are successively unlike and alternately alike, all of the tools being of the

rolling type.