US PATENT SUBCLASS 172 / 194
.~.~ Sweep adjustable

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

133  DF  DIVERSE TOOLS {29}
193  DF  .~ First tool with spaced trailing sweep {1}
194.~.~ Sweep adjustable

DEFINITION

Classification: 172/194

(under subclass 193) Apparatus in which the working position of the sweep can be selectively adjusted with respect to the earth working element.