4. Boring or penetrating the earth
  5. Bit or bit element
  6. With helical-conveying portion

Alvin K. Wilson

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Auger construction

Boring or penetrating the earth – Bit or bit element – With helical-conveying portion
Patent

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Cultivator tool for planting seedlings

Earth working – Driven from or guided by stationary object – or anchored – Rotatable about vertical axis
Patent

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Vegetation scalping and earth boring tool

Machines not elsewhere specified – Agricultural or construction machinery – Drilling – mining – or soil treatment
Patent

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Profile ID: LFUS-PAI-P-1067525

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