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

Boring or penetrating the earth – Bit or bit element – Cutting edge self-renewable during operation

Rotary drill bit

Boring or penetrating the earth – Bit or bit element – Cutting edge self-renewable during operation

Rotary drill bit

Boring or penetrating the earth – Bit or bit element – Cutting edge self-renewable during operation

Rotary drill bit

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

Rotary drill bit

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

Rotary drill bit

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

Rotary drill bit

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

Rotary drill bit

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

Rotary drill bit

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

Rotary drill bit

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

Rotary drill bit and method for making same

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

Rotary drill bit and roller cutter for rock drilling

Boring or penetrating the earth – Bit or bit element – Cutting edge self-renewable during operation

Rotary drill bit compensating for changes in hardness of...

Boring or penetrating the earth – Bit or bit element – Cutting edge self-renewable during operation

Rotary drill bit compensating for changes in hardness of...

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

Rotary drill bit for casting milling and formation drilling

Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element

Rotary drill bit for drilling through sticky formations

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

Rotary drill bit for use in drilling holes in subsurface earth f

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

Rotary drill bit having a non-rotating gauge section

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

Rotary drill bit having a solid forged, unitary body

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

Rotary drill bit having an insert with leading and trailing reli