US PATENT SUBCLASS 172 / 733
.~.~ Constant height and V-shape

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

681  DF  TOOL, STANDARD OR CONNECTION {32}
721  DF  .~ Non-rectangular, symmetrical type {8}
733.~.~ Constant height and V-shape

DEFINITION

Classification: 172/733

(under subclass 721) Apparatus in which the earth working element has the appearance of a V when viewed in plan all parts of the element having substantially the same vertical extent.