US PATENT SUBCLASS 172 / 56
.~.~ Staggered tools

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}
56.~.~ Staggered tools

DEFINITION

Classification: 172/56

(under subclass 48) Apparatus in which the plural driven earth working elements are individually spaced both laterally and in the direction of draft or travel.