US PATENT SUBCLASS 111 / 9
.~ Main and auxiliary frame machines

Current as of: June, 1999
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111 /   HD   PLANTING

8  DF  DRILLING AND BROADCASTING {1}
9.~ Main and auxiliary frame machines

DEFINITION

Classification: 111/9

(under subclass 8) Instruments embodying a main supporting-frame-section and an auxiliary frame-section, the latter usually composed of or carrying the earth-working tools and other elements and movable relative to the main

frame-section.