LandOfFree - US Patents - Listing for Boring or penetrating the earth,Below-ground impact members

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Cable overshot apparatus

Boring or penetrating the earth – Below-ground impact members

Patent

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Clutch for a jack element

Boring or penetrating the earth – Below-ground impact members

Reexamination Certificate

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Coil tubing hydraulic jar device

Boring or penetrating the earth – Below-ground impact members – Fluid-operated

Patent

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Coil tubing hydraulic jar device

Boring or penetrating the earth – Below-ground impact members – Fluid-operated

Patent

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Compensation device for insertion in a drill string for deep-wel

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...

Patent

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Compression shock absorber device

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...

Patent

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Control device

Boring or penetrating the earth – Below-ground impact members

Reexamination Certificate

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Converted dual-acting hydraulic drilling jar

Boring or penetrating the earth – Below-ground impact members – Fluid-operated

Patent

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Converted dual-acting hydraulic drilling jar

Boring or penetrating the earth – Below-ground impact members – Fluid-operated

Patent

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Coupling piece for use at simultaneous earth and/or rock drillin

Boring or penetrating the earth – Below-ground impact members – Fluid-operated

Patent

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