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

Hardmetal facing for rolling cutter drill bit

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

Head for a rock drill

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

Heat management drilling system and method

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

Helical impact bit for drilling stone with narrow guide lips

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

High density row on roller cone bit

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

High energy cutting elements and bits incorporating the same

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

High flow weld-in nozzle sleeve for rock bits

Reissue Patent

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

High flow weld-in nozzle sleeve for rock bits

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

High offset bits with super-abrasive cutters

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

High offset bits with super-abrasive cutters

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

High performance overlay for rock drilling bits

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

High pressure fluid jet cutting and drilling apparatus

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

High strength matrix material for PDC drag bits

Boring or penetrating the earth – Bit or bit element – Core forming type

High-speed drill for rock stake engineering

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

High-strength, high-toughness matrix bit bodies

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

High-strength/high toughness alloy steel drill bit blank

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

High-strength/high toughness alloy steel drill bit blank

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

High-strength/high-toughness alloy steel drill bit blank

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

Holding device for boring head tools or the like