US PATENT SUBCLASS 172 / 515
.~.~ Spring biased or spring formed

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

508  DF  WITH GUARD, SHIELD OR PLANT DIVERTER {3}
514  DF  .~ Weed turner or trash holddown {1}
515.~.~ Spring biased or spring formed {1}
516  DF  .~.~.~> Plural cooperating elements

DEFINITION

Classification: 172/515

(under subclass 514) Apparatus in which said means is (1) biased to a working position by a spring means, or (2) formed of a resilient material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

705+, for spring biased or spring formed earthworking tools or tool parts.