LandOfFree - US Patents - Listing for Boring or penetrating the earth,Bit or bit element,Nonsymmetrical bit

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Dual cutting mill

Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit

Reexamination Certificate

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Joint for use in a directional boring apparatus

Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit

Patent

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Percussion drill bit

Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit

Patent

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Percussion drill bit having centrally projecting insert

Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit

Patent

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Percussion rock drill bit

Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit

Patent

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Rock drill

Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit

Patent

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Rotary drill

Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit

Patent

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Rotary drill bits

Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit

Patent

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Rotary percussion earth boring bit

Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit

Patent

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Self-drilling dowel with an inclined rolling head

Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit

Patent

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Whirl resistant bit

Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit

Patent

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