4. Boring or penetrating the earth
  5. Below-ground impact members

Rainer S. Beccu

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Backhead and drill assembly with backhead

Boring or penetrating the earth – Below-ground impact members – Fluid-operated
Reexamination Certificate

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Backhead and drill assembly with backhead

Boring or penetrating the earth – Below-ground impact members
Reexamination Certificate

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Keyed connection for drill bit

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

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Keyed connection for drill bit

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

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Profile ID: LFUS-PAI-P-2226181

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