4. Bearings
  5. Rotary bearing
  6. Roller drill bit

Peter T. Cariveau

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Back reaming tool

Boring or penetrating the earth – Enlargement of existing pilot throughbore requiring...
Reexamination Certificate

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Drill bit with asymmetric gage pad configuration

Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit
Reexamination Certificate

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Mounting attachment and bearing system for an industrial...

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

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Protected lubricant reservoir for sealed bearing earth...

Boring or penetrating the earth – With storage means for bit lubricant carried by bit or shaft – With fluid pressure-actuated feed means
Reexamination Certificate

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Protected lubricant reservoir for sealed earth boring drill bit

Boring or penetrating the earth – With storage means for bit lubricant carried by bit or shaft – With fluid pressure-actuated feed means
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1758620

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