LandOfFree - US Patents - Listing for Boring or penetrating the earth,Boring without earth removal

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Ram boring apparatus

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

Patent

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Ram boring implement

Boring or penetrating the earth – Boring without earth removal

Patent

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Ram boring implement having a movable bit

Boring or penetrating the earth – Boring without earth removal

Patent

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Ram boring machine

Boring or penetrating the earth – Boring without earth removal

Patent

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Ram boring machine for laying service lines without excavation

Boring or penetrating the earth – Boring without earth removal

Patent

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Ram boring machine with impact blade piston

Boring or penetrating the earth – Boring without earth removal – Drive point detached from shaft to form cased bore or with...

Patent

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Ram-borer apparatus

Boring or penetrating the earth – Boring without earth removal – Drive point detached from shaft to form cased bore or with...

Patent

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Reversible air-operated apparatus of the percussive type for dri

Boring or penetrating the earth – Boring without earth removal

Patent

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Reversible air-operated percussive action machine for driving ho

Boring or penetrating the earth – Boring without earth removal

Patent

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Reversible expander

Boring or penetrating the earth – Boring without earth removal

Patent

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Reversible penetrating machine with a differential air...

Boring or penetrating the earth – Boring without earth removal

Reexamination Certificate

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Reversible percussion piston drill apparatus

Boring or penetrating the earth – Boring without earth removal

Patent

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Reversible, percussive device for ground perforation

Boring or penetrating the earth – Boring without earth removal

Patent

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Reversing pneumatic percussive device

Boring or penetrating the earth – Boring without earth removal

Patent

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Rotatable drill pipe having an auger on a free end thereof

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

Patent

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Rotating drum variable depth sampler

Boring or penetrating the earth – Boring without earth removal – Combined with earth removal

Reexamination Certificate

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Rotating push rod boring system

Boring or penetrating the earth – Boring without earth removal

Reexamination Certificate

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