US PATENT SUBCLASS 111 / 53
.~.~ Sectional main frame

Current as of: June, 1999
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111 /   HD   PLANTING

14  DF  DRILLING {12}
52  DF  .~ Frame and planting-element arrangement {4}
53.~.~ Sectional main frame {2}
54  DF  .~.~.~> Flexible {2}
57  DF  .~.~.~> Extensible {1}

DEFINITION

Classification: 111/53

(under subclass 52) Devices wherein the frame being in a plurality of sections joining in the support of the total load placed upon the machine.