US PATENT SUBCLASS 172 / 441
.~.~ Tandem gangs

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

439  DF  MAST TYPE HITCH (E.G., THREE POINT HITCH, ETC.) {10}
440  DF  .~ Angled gangs liftable as a unit {1}
441.~.~ Tandem gangs {1}
442  DF  .~.~.~> With actuator for angling groups relatively

DEFINITION

Classification: 172/441

(under subclass 440) Apparatus in which one row of earth working element is located generally behind another row of earth working elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

455, for tandem-angled gangs liftable for transport on a wheeled frame by an actuating means other than a mast- type hitch.

595, and 596, for tandem disk gangs.