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

William G. Crossland

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High power umbilicals for electric flowline immersion...

Wells – With heating – refrigerating or heat insulating means – Heater surrounding production tube
Reexamination Certificate

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High power umbilicals for subterranean electric drilling...

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

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Substantially neutrally buoyant and positively buoyant...

Wells – Submerged well – Riser
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2870349

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