4. Boring or penetrating the earth
  5. With signaling, indicating, testing or measuring

Mario A. Araya

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Downhole drilling apparatus and method for using same

Boring or penetrating the earth – With signaling – indicating – testing or measuring
Reexamination Certificate

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While drilling system and method

Boring or penetrating the earth – With signaling – indicating – testing or measuring – Measuring or indicating drilling fluid rate of flow
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2687214

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