4. Boring or penetrating the earth
  5. With tool shaft detail
  6. Helix or helically arranged structure

James B. Mason

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Drill bit with debris conveying flute

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure
Patent

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Method of forming a drill bit with debris conveying flute

Metal tools and implements – making – Blank or process – Drill
Patent

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Rotating coupling

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With valve
Patent

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Profile ID: LFUS-PAI-P-286037

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