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

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

Squaring off and reaming tool for deep elongated trench excavati

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

Stability enhanced drill bit and cutting structure having zones

Boring or penetrating the earth – Bit or bit element – Noncutting portion forwardly of cutting portion

Stabilizer and blade attachment means therefor

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

Stabilizer blade

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

Stabilizing drill bit

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

Stabilizing drill bit with improved cutting elements

Boring or penetrating the earth – Bit or bit element – With bit guide or bore wall compacting device

Stabilizing system and methods for a drill bit

Boring or penetrating the earth – Bit or bit element – With bit guide or bore wall compacting device

Stabilizing system and methods for a drill bit

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

Steel body drill bits with tailored hardfacing structural...

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

Steel body rotary drill bits including support elements...

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

Steel tooth bit with a bi-metallic gage hardfacing

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

Steel tooth bit with extra-thick hardfacing

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

Steel tooth cutter element with expanded crest

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

Steel tooth cutter element with gage facing knee

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

Steel tooth drill bit with improved tooth breakage resistance

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

Steel-bodied bit

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

Steel-bodied bit

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

Steep angle raise bit

Boring or penetrating the earth – Bit or bit element – With bit guide or bore wall compacting device

Steerable rotary drag bit with longitudinally variable gage aggr