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Screw ring cone retention apparatus and method for rock bits

Bearings – Rotary bearing – Roller drill bit
Patent

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Seal and bearing apparatus for bits

Bearings – Rotary bearing – Roller drill bit
Patent

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Sealed bearing drill bit with dual-seal configuration

Bearings – Rotary bearing – Roller drill bit
Patent

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Sealed bearing drill bit with dual-seal configuration and fluid-

Bearings – Rotary bearing – Roller drill bit
Patent

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Sealed bearing drill bit with dual-seal configuration and...

Bearings – Rotary bearing – Roller drill bit
Reexamination Certificate

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Sealed hard-rock drill bit

Bearings – Rotary bearing – Roller drill bit
Patent

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Sealing assembly for relatively movable members

Bearings – Rotary bearing – Roller drill bit
Patent

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Spaced button thrust surface for earth boring bit

Bearings – Rotary bearing – Roller drill bit
Patent

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