4. Earth working
  5. Automatic power control
  6. Obstruction sensing type

John C. David

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Agricultural cultivator

Earth working – Diverse tools – With independent means for vertical movement
Patent

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Attachment for removing residue in front of a planter

Earth working – Diverse tools – Laterally spaced like tools with intermediate diverse tool
Patent

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Guidance control apparatus for agricultural implement

Earth working – Automatic power control – Obstruction sensing type
Patent

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Guidance control apparatus for agricultural implement

Earth working – Automatic power control – Obstruction sensing type
Patent

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Liquid fertilizer attachment

Planting – Liquid or gas soil treatment – Hand manipulated
Patent

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Profile ID: LFUS-PAI-P-253443

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