4. Boring or penetrating the earth
  5. Bit or bit element
  6. With fluid conduit lining or element

David H. Marshall

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Auto-coupling tool for drill-pipes

Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Patent

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Parser translator system and method

Data processing: software development – installation – and managem – Software program development tool – Translation of code
Reexamination Certificate

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Profile ID: LFUS-PAI-P-370434

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