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Deviation device

Boring or penetrating the earth – Boring without earth removal – Fluid passage to exterior of drive point
Patent

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Device for boring holes in the ground

Boring or penetrating the earth – Boring without earth removal – Fluid passage to exterior of drive point
Patent

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Drill bit for geological exploration

Boring or penetrating the earth – Boring without earth removal – Fluid passage to exterior of drive point
Patent

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Drill bit for geological exploration

Boring or penetrating the earth – Boring without earth removal – Fluid passage to exterior of drive point
Patent

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Drill bit shear relief for horizontal directional drilling...

Boring or penetrating the earth – Boring without earth removal – Fluid passage to exterior of drive point
Reexamination Certificate

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Drill head

Boring or penetrating the earth – Boring without earth removal – Fluid passage to exterior of drive point
Patent

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Drill head

Boring or penetrating the earth – Boring without earth removal – Fluid passage to exterior of drive point
Patent

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Drill string shutoff valve

Boring or penetrating the earth – Boring without earth removal – Fluid passage to exterior of drive point
Reexamination Certificate

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Drilling equipment

Boring or penetrating the earth – Boring without earth removal – Fluid passage to exterior of drive point
Patent

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Driven groundwater sampling device

Boring or penetrating the earth – Boring without earth removal – Fluid passage to exterior of drive point
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