4. Boring or penetrating the earth
  5. With signaling, indicating, testing or measuring
  6. Indicating, testing or measuring a condition of the formation

Tu Tien Trinh

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Hydrostatic bearing

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Reexamination Certificate

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Method and apparatus for collecting drill bit performance data

Boring or penetrating the earth – With signaling – indicating – testing or measuring – Tool position direction or inclination measuring or...
Reexamination Certificate

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Method and apparatus for collecting drill bit performance data

Boring or penetrating the earth – With signaling – indicating – testing or measuring – Indicating – testing or measuring a condition of the formation
Reexamination Certificate

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Method and apparatus for collecting drill bit performance data

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

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System, method and apparatus for enhanced cutting element...

Metal tools and implements – making – Blank or process – Drill
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2390897

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