US PATENT SUBCLASS 172 / 638
.~.~.~ Gear

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

613  DF  PLURAL RELATIVELY MOVABLE TOOLS {14}
634  DF  .~ Parallel, pivotally adjusted tool bars {2}
635  DF  .~.~ With actuator {3}
638.~.~.~ Gear

DEFINITION

Classification: 172/638

(under subclass 635) Apparatus in which the actuator comprises gearing.