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

Robert H. Slaughter, Jr.

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Back reaming tool

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

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Bearing and lubrication system for earth boring bit

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

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Cone erosion protection for roller cone drill bits

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

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Cone erosion protection for roller cone drill bits

Cutlery – Pipe and rod cutters – Rotary
Reexamination Certificate

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Drill bit having replaceable nozzles directing drilling fluid at

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

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Profile ID: LFUS-PAI-P-573572

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