LandOfFree - US Patents - Listing for Boring or penetrating the earth,Bit or bit element,Rolling cutter bit or rolling cutter bit element

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Rotary earth boring drill and method of assembly thereof

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

Patent

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Rotary earth strata penetrating tool with a cermet insert having

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

Patent

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Rotary mining bit

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

Patent

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Rotary rock bit and method of making same

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

Patent

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Rotary rock bit and method of making same

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

Patent

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Rotary rock bit ball plug

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

Patent

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Rotary rock bit with hardfacing to reduce cone erosion

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

Reexamination Certificate

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Rotary rock bit with independently true rolling cutters

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

Patent

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Rotary rock bit with infiltrated bearings

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

Patent

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Rotary rock bit with infiltrated bearings

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

Patent

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Rotary rock bit with multiple row coverage for very hard formati

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

Patent

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Rotary rock bit with the bearing pin fused to the rock bit arm

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

Patent

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Rotary stone-cutting head with hardened teeth inserts

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

Patent

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Rotating cutter drill set

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

Patent

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Rotating pilot core bit for use in highly fractured formations

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

Patent

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