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

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

Rock drill with hard metal drilling head

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

Rock drill with helical dust conveying groove

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

Rock drilling bit and a method of producing the same

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

Rock drilling tool

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

Rock drilling tool and reamer for percussive drilling

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

Rock drilling tool having pulsed jets

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

Rock drilling tool including a drill bit having a recess in a fr

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

Rock drilling tool with radially extendable two-piece reamer

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

Rock drilling tool, drill bit and a method of transferring percu

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

Rock working tool

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

Rock-breaking implement for percussive machines

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

Rock-breaking tool for percussive-action machines

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

Rock-drilling bit for percussion hammers

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

Rockbit with attachable device for improved cone cleaning

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

Roller ball retention of reamer cutter assembly

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

Roller bit

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

Roller bit parallel inlayed compacts

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

Roller bit seal excluded from cuttings by air discharge

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

Roller bit with a journal pin offset from the central axis...