4. Boring or penetrating the earth
  5. Bit or bit element
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Preform cutting elements for rotary drill bits

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Preform elements and mountings therefor

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Preformed tooth for tooth bit

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Prevention of cone seal failures in 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

Protected cutter mounting for drill 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

Protective overlay coating for PDC drill bits

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Protector for rock bit seals

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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