4. Metal tools and implements, making
  5. Blank or process
  6. Drill

Daniel W. Varel

Inventor

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Method for manufacturing a rotary drill bit having a solid forge

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

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Rotary drill bit having a solid forged, unitary body

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Profile ID: LFUS-PAI-P-779021

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