LandOfFree - US Patents - Listing for Boring or penetrating the earth,With tool shaft detail

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Drilling motor drill bit reaming stabilizer

Boring or penetrating the earth – With tool shaft detail – Shaft carried guide or protector

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

Drilling stabilizer

Boring or penetrating the earth – With tool shaft detail – Shaft carried guide or protector

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Drilling string shock-absorbing tool

Boring or penetrating the earth – With tool shaft detail – Axially telescoping shaft section

Patent

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Drilling string shock-absorbing tool

Boring or penetrating the earth – With tool shaft detail – Axially telescoping shaft section

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Drilling sub

Boring or penetrating the earth – With tool shaft detail

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Drilling tool

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Patent

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Drilling tool having frictionally rotatable drilling head

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Patent

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Drilling tool intended to widen a well

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Patent

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Drilling tool with an interchangeable conveying spiral

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Patent

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Dry hollow stem augers

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure

Patent

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Dual wall drill string assembly

Boring or penetrating the earth – With tool shaft detail

Reexamination Certificate

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Dual wall drill string assembly

Boring or penetrating the earth – With tool shaft detail

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

Dynamic damper for use in a drill string

Boring or penetrating the earth – With tool shaft detail – Shaft carried guide or protector

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

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