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

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

Rock drill bit inserts with hollow bases

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

Rock drill bit with neck protection

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 – Rolling cutter bit or rolling cutter bit element

Rock working tool

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...

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

Roller cone bit bearing with elastomeric seal having self...

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

Roller cone bit with improved seal gland design

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

Roller cone bit with positive and negative offset and smooth run

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

Roller cone bits with wear and fracture resistant surface

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

Roller cone bits with wear and fracture resistant surface

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

Roller cone bits with wear and fracture resistant surface

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

Roller cone core bit

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

Roller cone drill bit

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

Roller cone drill bit having non-axisymmetric cutting...