4. Boring or penetrating the earth
  5. Bit or bit element
  6. Plural separable cutter elements

Norman Dean Dyer

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Adjustable bucket for an earth boring machine

Mining or in situ disintegration of hard material – Hard material disintegrating machines – With mine roof-supporting means
Patent

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Earth boring cutting element retention system

Boring or penetrating the earth – Bit or bit element – Plural separable cutter elements
Patent

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Profile ID: LFUS-PAI-P-463762

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