4. Boring or penetrating the earth
  5. With below-ground tool drive prime mover
  6. Fluid rotary type

Serge Mathieu Roggeband

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Bore hole tool assembly and method of designing same

Metal working – Method of mechanical manufacture – Process for making bearing or component thereof
Reexamination Certificate

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System for use in a bore hole for axially coupling a tubular...

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2421899

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