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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

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

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

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Rotary drill bits

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

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Rotary drill bits and method of use

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

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

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Rotary percussion drill bit

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

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Rotary percussion earth boring bit

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

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Rotatable cutting bit assembly with wedge-lock retention assembl

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

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Round/flat carbide seat

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

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Sintered and forged article, and method of forming same

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

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Specially shaped cutting element for earth boring apparatus

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

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Tool insert

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

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Tooth loading for earth boring bits

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

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