4. E - Fixed Constructions
  5. 21
  6. B

James W. Jr. Langford

E - Fixed Constructions – 21 – B

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Country: United States Of America

Abradable cutter protection

E - Fixed Constructions – 21 – B
Patent

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Drill bit wear resistant surface for elastomeric seal

E - Fixed Constructions – 21 – B
Patent

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Hardfacing with coated diamond particles

E - Fixed Constructions – 21 – B
Patent

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Roller drill bit having radial-thrust pilot bushing...

E - Fixed Constructions – 21 – B
Patent

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Profile ID: LFCA-PAI-P-1101621

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