4. Boring or penetrating the earth
  5. Processes

Antonio Maria Guimaraes Leite Cruz

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Drill bit, system, and method for drilling a borehole in an...

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

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Percussive drill bit

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

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Percussive drill bit, drilling system comprising such a...

Boring or penetrating the earth – Processes
Reexamination Certificate

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Profile ID: LFUS-PAI-P-3165205

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