US PATENT SUBCLASS 172 / 471
.~.~ Three or more independent actuators

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

452  DF  WITH ACTUATOR ADAPTED TO LIFT TOOL FOR TRANSPORT ON WHEELED FRAME OR BROADLY CLAIMED IMPLEMENT {37}
468  DF  .~ Plural tools, independently actuatable {3}
471.~.~ Three or more independent actuators

DEFINITION

Classification: 172/471

(under subclass 468) Apparatus in which there are three or more separate earth working elements each with a separate actuator.