4. Boring or penetrating the earth
  5. Bit or bit element
  6. Rolling cutter bit or rolling cutter bit element

Daniel E. Ruff

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Drill bits with controlled exposure of cutters

Boring or penetrating the earth – Processes
Reexamination Certificate

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Drill bits with reduced exposure of cutters

Boring or penetrating the earth – Processes
Reexamination Certificate

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Drill bits with reduced exposure of cutters

Boring or penetrating the earth – Processes
Reexamination Certificate

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Drill bits with reduced exposure of cutters

Boring or penetrating the earth – Processes
Reexamination Certificate

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Drilling apparatus with reduced exposure of cutters and...

Boring or penetrating the earth – Processes
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2194898

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