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

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Vacuum, vacuum-pressure, or pressure reverse circulation bit

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

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Variable diameter earth boring bit

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

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Variable length three-cone rock bit nozzles

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

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Variable orientation nozzles for earth boring drill bits,...

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

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

Varied pitch rotary rock bit

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

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Vibration and erosion resistant nozzle

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

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Volume and pressure balanced rigid face seal for rock bits

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

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Wear compensating rock bit insert

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

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Well jet device and the operating method thereof

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

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

Wide groove roller cone bit

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

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

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