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Patent applications and USPTO patent grants for Berzas; Sean K..The latest application filed is for "drilling assemblies including one of a counter rotating drill bit and a counter rotating reamer, methods of drilling, and methods of forming drilling assemblies".
Patent | Date |
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Drilling assemblies including one of a counter rotating drill bit and a counter rotating reamer, methods of drilling, and methods of forming drilling assemblies Grant 8,201,642 - Radford , et al. June 19, 2 | 2012-06-19 |
Drilling Assemblies Including One Of A Counter Rotating Drill Bit And A Counter Rotating Reamer, Methods Of Drilling, And Methods Of Forming Drilling Assemblies App 20100181112 - Radford; Steven R. ;   et al. | 2010-07-22 |
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