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Roof drill bit

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

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Roof drill bit

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

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Roof drill bit tip

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

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Roof drill bit with hexagonal body portion

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

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Roof drill bit with radial domed PCD inserts

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

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Roof drill bit, roof drill bit body and hard cutting insert...

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

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Roof drill brazing shim

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

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Roof drilling system improvements

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

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Roof drilling system improvements

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

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Rotary abrasive drilling bit

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

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Rotary air percussion bit

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

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Rotary bit with an indenting member

Boring or penetrating the earth – Bit or bit element – Core forming type
Reexamination Certificate

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Rotary bit with gageless waist

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

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Rotary bit with jet nozzles

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

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Rotary bit with ridges

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

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Rotary borer

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

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Rotary boring bit and borer

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

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Rotary cone bit for cutting removal

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

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Rotary cone bit with functionally-engineered composite inserts

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

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Rotary cone cutter

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

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