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Patent applications and USPTO patent grants for Fierro; Cesar A..The latest application filed is for "wear resistant plates on a leading transitional surface of the leg for a rotary cone drill bit".
Patent | Date |
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Wear resistant plates on a leading transitional surface of the leg for a rotary cone drill bit Grant 9,488,007 - Harrington , et al. November 8, 2 | 2016-11-08 |
Wear Resistant Plates On A Leading Transitional Surface Of The Leg For A Rotary Cone Drill Bit App 20140299384 - Harrington; David Michel ;   et al. | 2014-10-09 |
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