4. Earth working
  5. Tool, standard or connection
  6. Interlocked or interfitted parts

Forrest E. Robertson

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Apparatus for subsoil application

Planting – Liquid or gas soil treatment – Hand manipulated
Patent

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Furrow opener and follower blade

Planting – Drilling – Lister units
Patent

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Ground penetrating tool for farm implement shanks

Earth working – Tool – standard or connection – Interlocked or interfitted parts
Patent

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Planter with cooperating trash clearing discs

Earth working – Diverse tools – Diverse rolling
Patent

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Seed planter furrow opener and follower therefor

Earth working – Tool – standard or connection – Non-rectangular – symmetrical type
Patent

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Profile ID: LFUS-PAI-P-580860

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