4. Boring or penetrating the earth
  5. Processes

Randy LeBlanc

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Mandrel and bearing assembly for downhole drilling motor

Boring or penetrating the earth – With below-ground tool drive prime mover – Below-ground storage of motivating energy
Reexamination Certificate

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Universal joint assembly

Boring or penetrating the earth – Processes
Reexamination Certificate

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Profile ID: LFUS-PAI-P-3208659

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