US PATENT SUBCLASS 172 / 625
.~.~.~ With alternate draft means (spaced 90 degrees)

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

613  DF  PLURAL RELATIVELY MOVABLE TOOLS {14}
619  DF  .~ Plural tool groups relatively vertically movable because of operation {9}
624  DF  .~.~ Plural groups movably connected to forward transverse draft bar {4}
625.~.~.~ With alternate draft means (spaced 90 degrees)

DEFINITION

Classification: 172/625

(under subclass 624) Apparatus in which the earth working element groups are provided with draft or hitch means whereby they may be drawn alternately in different directions spaced 90 deg. from one another.