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

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

Impregnated type rotary drill bits

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

Increased projection for compacts of a rolling cone drill bit

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

Insert chip of oil-drilling tricone bit, manufacturing...

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

Insert for a drill bit incorporating a PDC layer having extended

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

Insert having a surface of carbide particles

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

Inserts and compacts having coated or encrusted cubic boron...

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

Inserts and compacts with lead-in surface for enhanced retention

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

Inserts for earth-boring bits

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

Internally reinforced polycrystalling abrasive insert