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

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Drilling bit fluid-cooled friction bearing

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore

Drilling bit for blast furnace tap holes

Boring or penetrating the earth – Bit or bit element – Casing shoe type

Drilling bit for drilling while running casing

Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet

Drilling bit with full release void areas

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Drilling bit with improved trailing edge vent

Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet

Drilling bits for plastic formations

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Drilling device

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Drilling device and method for producing undercut holes

Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element

Drilling head

Boring or penetrating the earth – Bit or bit element

Drilling head

Boring or penetrating the earth – Bit or bit element – With helical-conveying portion

Drilling head

Boring or penetrating the earth – Bit or bit element – Impact or percussion type

Drilling head for an anchor

Boring or penetrating the earth – Bit or bit element – Specific or diverse material

Drilling head of a rock drill

Boring or penetrating the earth – Bit or bit element – Plural separable cutter elements

Drilling head of a rotary impact drill

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Drilling head with a cone rock bit

Boring or penetrating the earth – Bit or bit element – Specific or diverse material

Drilling stabilizer

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

Drilling structure with non-axial gage

Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element

Drilling system drive steel

Boring or penetrating the earth – Bit or bit element – Specific or diverse material

Drilling systems including fiber-containing...