US PATENT SUBCLASS 111 / 75
.~.~.~.~ Vibrating hopper

Current as of: June, 1999
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111 /   HD   PLANTING

14  DF  DRILLING {12}
52  DF  .~ Frame and planting-element arrangement {4}
70  DF  .~.~ Rigid {1}
71  DF  .~.~.~ Single row {6}
75.~.~.~.~ Vibrating hopper

DEFINITION

Classification: 111/75

(under subclass 71) Devices wherein the material is dispensed from a hopper that has a back-and-forth movement, either oscillating or reciprocating.