4. Mining or in situ disintegration of hard material
  5. Miscellaneous

Ray H. Shaw

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Bit seat protector device for drilling systems or the like

Boring or penetrating the earth – With tool shaft detail
Patent

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Retainer device for auger, roof and the like type bits

Mining or in situ disintegration of hard material – Miscellaneous
Patent

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Retainer device for drill bit

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

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Profile ID: LFUS-PAI-P-1190906

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