4. Boring or penetrating the earth
  5. With tool shaft detail
  6. Means other than tool structure to induce fluent flow

David John Kusko

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Flow hydraulic amplification for a pulsing, fracturing, and...

Wells – Processes – Vibrating the earth or material in or being placed in the...
Reexamination Certificate

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Pulse rate of penetration enhancement device and method

Boring or penetrating the earth – With tool shaft detail – Means other than tool structure to induce fluent flow
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2256986

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