4. Boring or penetrating the earth
  5. Boring a submerged formation
  6. Boring with underwater tool drive prime mover

William M. Inwalle

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Apparatus and method for gravel packing an interval of a...

Wells – Processes – Graveling or filter forming
Reexamination Certificate

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Apparatus and methods for perforating a subterranean formation

Wells – Processes – Separate steps of fracturing or attacking formation
Reexamination Certificate

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Downhole drilling apparatus

Boring or penetrating the earth – Boring a submerged formation – Boring with underwater tool drive prime mover
Reexamination Certificate

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