4. Boring or penetrating the earth
  5. Bit or bit element
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Hydraulic energy drill bit

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Hydraulic mining nozzle-air lift device

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Hydro-lifter rock bit with PDC inserts

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

Hydro-lifter rock bit with PDC inserts

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

Hydro-lifter rock bit with PDC inserts

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

Hydrodynamic lubricant seal 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

Hydromechanical drilling device

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

Hydrostatic bearing

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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