US PATENT SUBCLASS 111 / 57
.~.~.~ Extensible

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  DF  .~.~ Sectional main frame {2}
57.~.~.~ Extensible {1}
58  DF  .~.~.~.~> V-shaped

DEFINITION

Classification: 111/57

(under subclass 53) Devices wherein the sections of the main frame having capacity of movement to each other resulting in an enlargement of frame to cover increased area of ground.