US PATENT SUBCLASS 172 / 682
.~ Tool flexed to change contour

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

681  DF  TOOL, STANDARD OR CONNECTION {32}
682.~ Tool flexed to change contour

DEFINITION

Classification: 172/682

(under subclass 681) Apparatus in which the working surface of an earth working element is selectively distorted or warped to vary the shape of the element.