US PATENT SUBCLASS 172 / 58
.~.~.~ Longitudinal axes

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

35  DF  WITH DRIVE MEANS FOR TOOL OR CLEANER {37}
48  DF  .~ Plural driven tools {6}
57  DF  .~.~ Laterally spaced tools {3}
58.~.~.~ Longitudinal axes

DEFINITION

Classification: 172/58

(under subclass 57) Apparatus in which the axes of cyclic movement of the spaced earth working elements are parallel to each other and to the direction of draft.