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Rotary drill bits with nozzle former and method of manufacturing

Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Patent

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Rotary drill bits with plural sealing systems

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

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Rotary drilling bits

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

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Rotary drilling bits for directional drilling exhibiting...

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

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Rotary drilling device

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

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Rotary drilling device

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

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Rotary drilling device

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

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Rotary drilling tools

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

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Rotary drills and drill bits

Boring or penetrating the earth – Bit or bit element – Plural separable cutter elements
Patent

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Rotary drills bits

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

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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 drill bit socket shield

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

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Rotary earth drilling bit

Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or 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 hammerdrill bit

Boring or penetrating the earth – Bit or bit element – Impact or percussion type
Reexamination Certificate

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Rotary mine drilling bit for making blast holes

Boring or penetrating the earth – Bit or bit element – Plural separable cutter elements
Reexamination Certificate

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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 mining tools

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

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Rotary mining tools

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

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Rotary percussion bit

Boring or penetrating the earth – Bit or bit element – Plural separable cutter elements
Patent

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