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

Stephen Martin Evans

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Method of applying a wear-resistant layer to a surface of a...

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 applying a wear-resistant layer to a surface of a...

Metal fusion bonding – Process – Metal to nonmetal with separate metallic filler
Reexamination Certificate

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Methods of manufacturing rotary drill bits

Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Patent

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Methods of manufacturing rotary drill bits

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

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Methods of manufacturing rotary drill bits

Metal treatment – Process of modifying or maintaining internal physical... – Producing or treating layered – bonded – welded – or...
Reexamination Certificate

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Profile ID: LFUS-PAI-P-191550

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