US PATENT SUBCLASS 172 / 687
.~.~ Longitudinally spaced rows

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


172 /   HD   EARTH WORKING

681  DF  TOOL, STANDARD OR CONNECTION {32}
685  DF  .~ Plural tools {6}
687.~.~ Longitudinally spaced rows {1}
688  DF  .~.~.~> Staggered

DEFINITION

Classification: 172/687

(under subclass 685) Apparatus having a plurality of rows of earth working elements (at least three elements to the row) extending transversely of the line of travel and traveling generally one behind the other.

SEE OR SEARCH THIS CLASS, SUBCLASS:

379, for hand tools having plural rows of prongs or teeth.