US PATENT SUBCLASS 172 / 382
MULTIPLE LEVEL TOOLS
Current as of: June, 1999
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DEFINITION
Classification: 172/382
(under the class definition) Apparatus including a plurality of earth working elements so mounted as to operate at different depths in the ground at the same time.
(1) Note. This subclass does not include apparatus having a plurality of laterally spaced tools set at different elevations for the purpose of operating at the same depth in the soil on a slope, furrow, ridge, etc. See subclasses 694+ for such tools.
SEE OR SEARCH THIS CLASS, SUBCLASS:
133+, for separate tools of unlike types which may operate at different depths and see particularly subclasses 144 and 163+ for the combination of a plow and jointer.
SEE OR SEARCH CLASS
171, Unearthing Plants or Buried Objects, 10, for unearthing devices with preliminary removal of earth.
