Bradford; John F.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Bradford; John F..The latest application filed is for "hybrid drill bits having increased drilling efficiency".
- Bradford; John F. - The Woodlands TX
- Bradford; John F. - Fort Worth TX
- Bradford; John F. - Katy TX
| Patent | Date |
|---|---|
| Hybrid drill bits having increased drilling efficiency Grant 10,190,366 - Zahradnik , et al. Ja | 2019-01-29 |
| Hybrid drill bits Grant 10,072,462 - Zahradnik , et al. September 11, 2 | 2018-09-11 |
| Hybrid drill bit having increased service life Grant 9,782,857 - Nguyen , et al. October 10, 2 | 2017-10-10 |
| Drill bits with anti-tracking features Grant 9,657,527 - Buske , et al. May 23, 2 | 2017-05-23 |
| Hybrid Drill Bits Having Increased Drilling Efficiency App 20160251902 - ZAHRADNIK; Anton F. ; et al. | 2016-09-01 |
| Hybrid Drill Bits App 20160230467 - Zahradnik; Anton F. ; et al. | 2016-08-11 |
| Hybrid drill bits having increased drilling efficiency Grant 9,353,575 - Zahradnik , et al. May 31, 2 | 2016-05-31 |
| Downhole tools including bearings and methods of forming same Grant 9,290,997 - Flores , et al. March 22, 2 | 2016-03-22 |
| Drill Bits With Anti-tracking Features App 20150211303 - BUSKE; Robert J. ; et al. | 2015-07-30 |
| Hybrid Drill Bit Having Increased Service Life App 20150152687 - Nguyen; Don Q. ; et al. | 2015-06-04 |
| Drill bits with anti-tracking features Grant 8,950,514 - Buske , et al. February 10, 2 | 2015-02-10 |
| Bearings For Downhole Tools, Downhole Tools Incorporating Such Bearings, And Methods Of Cooling Such Bearings App 20140301679 - Flores; Alejandro ; et al. | 2014-10-09 |
| Bearings for downhole tools, downhole tools incorporating such bearings, and methods of cooling such bearings Grant 8,834,026 - Flores , et al. September 16, 2 | 2014-09-16 |
| Hybrid Drill Bits Having Increased Drilling Efficiency App 20130313021 - Zahradnik; Anton F. ; et al. | 2013-11-28 |
| Drill bit with an adjustable steering device Grant 8,240,399 - Kulkarni , et al. August 14, 2 | 2012-08-14 |
| Bearings For Downhole Tools, Downhole Tools Incorporating Such Bearings, And Methods Of Cooling Such Bearings App 20120080230 - Flores; Alejandro ; et al. | 2012-04-05 |
| Drill bit with an adjustable steering device Grant 8,087,479 - Kulkarni , et al. January 3, 2 | 2012-01-03 |
| Drill Bits with Anti-Tracking Features App 20110315452 - Buske; Robert J. ; et al. | 2011-12-29 |
| Early Wear Detection App 20110290560 - Buske; Robert J. ; et al. | 2011-12-01 |
| Drill Bit With An Adjustable Steering Device App 20110147089 - Kulkarni; Ajay V. ; et al. | 2011-06-23 |
| Drill Bit With An Adjustable Steering Device App 20110031025 - Kulkarni; Ajay V. ; et al. | 2011-02-10 |
| Method For Non-destructively Evaluating Rotary Earth Boring Drill Components And Determining Fitness-for-use Of The Same App 20100329081 - Sullivan; Eric ; et al. | 2010-12-30 |
| Process for polymer degradation Grant 5,587,434 - McCullough, Jr. , et al. December 24, 1 | 1996-12-24 |
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