US PATENT SUBCLASS 111 / 16
.~.~ Check correcting


Current as of: June, 1999
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111 /   HD   PLANTING

14  DF  DRILLING {12}
15  DF  .~ Hill-planting machines {5}
16.~.~ Check correcting {1}
17  DF  .~.~.~> With automatic regulator


DEFINITION

Classification: 111/16

(under subclass 15) Devices embodying instrumentalities for effecting a change in the relationship of machine parts for the purpose of starting or maintaining the transverse alinement of points of material deposit in successively-drilled lines.