US PATENT SUBCLASS 172 / 163
.~ Jointer and plow
Current as of: June, 1999
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DEFINITION
Classification: 172/163
(under subclass 133) Apparatus comprising the combination of an earth working element having a moldboard for raising and inverting a furrow slice and a second earth working element operating in advance of the first and operative to raise and turn a smaller furrow slice and deposit it in the far side of a previously formed furrow so as to be covered by the furrow slice of the moldboard-type earth working element.
SEE OR SEARCH THIS CLASS, SUBCLASS:
144, for the combination of a plow, colter, and jointer.
382, for a plurality of like earth working elements (e.g., plows) which operate at different depths in the soil.
