US PATENT SUBCLASS 172 / 390
.~.~ Parallel pivoted tooth bars

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

387  DF  WITH WHEEL SUBSTITUTE (E.G., RUNNER, ETC.) {6}
389  DF  .~ Spring tooth implement {1}
390.~.~ Parallel pivoted tooth bars

DEFINITION

Classification: 172/390

(under subclass 389) Apparatus in which a plurality of the earth working elements are carried by a plurality of parallel transverse bars which are pivotally mounted and selectively rotatable from one angular position of adjustment to another.

SEE OR SEARCH THIS CLASS, SUBCLASS:

634+, for implements with parallel pivotally adjusted tool bars which may have spring-tooth tools mounted thereon.