US PATENT SUBCLASS 172 / 709
.~.~ Laterally biased

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

681  DF  TOOL, STANDARD OR CONNECTION {32}
705  DF  .~ Spring biased or formed tool or tool part {5}
709.~.~ Laterally biased

DEFINITION

Classification: 172/709

(under subclass 705) Apparatus comprising an earth working element is capable of movement transversely of the direction of travel and resilient means to resist said movement.