4. Boring or penetrating the earth
  5. Bit or bit element
  6. Rolling cutter bit or rolling cutter bit element

Stewart Middlemiss

Inventor

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Gage trimmers and bit incorporating the same

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

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Method of forming cutting elements

Abrasive tool making process – material – or composition – With inorganic material
Reexamination Certificate

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Polycrystalline diamond carbide composites

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

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Polycrystalline diamond carbide composites

Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Metal and nonmetal in final product
Reexamination Certificate

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Polycrystalline diamond with improved abrasion resistance

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

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Profile ID: LFUS-PAI-P-2458738

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