4. Boring or penetrating the earth
  5. Bit or bit element
  6. Magnetized or with magnet

Charles R. Harris

Inventor

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Hybrid rock bit

Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet
Patent

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Longitudinal axis roller drill bit with gage inserts protection

Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet
Patent

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Rock drill bit inserts with hollow bases

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

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Straight hole insert drill bit

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-673881

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