Blackman; Mark P.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Blackman; Mark P..The latest application filed is for "hybrid drill bit and design method".
- Blackman; Mark P. - Spring TX
- Blackman; Mark P. - Conroe TX
- Blackman; Mark P. - Lewisville TX
| Patent | Date |
|---|---|
| Hybrid drill bit and design method Grant 10,871,036 - Zahradnik , et al. December 22, 2 | 2020-12-22 |
| Hybrid Drill Bit And Design Method App 20190352971 - Zahradnik; Anton F. ; et al. | 2019-11-21 |
| Hybrid drill bit and design method Grant 10,316,589 - Zahradnik , et al. | 2019-06-11 |
| Hybrid drill bit having increased service life Grant 9,782,857 - Nguyen , et al. October 10, 2 | 2017-10-10 |
| Hybrid drill bit Grant 9,670,736 - Zahradnik , et al. June 6, 2 | 2017-06-06 |
| Hybrid Drill Bit Having Increased Service Life App 20150152687 - Nguyen; Don Q. ; et al. | 2015-06-04 |
| System and method for adjusting roller cone profile on hybrid bit Grant 8,978,786 - Nguyen , et al. March 17, 2 | 2015-03-17 |
| Hybrid Drill Bit And Design Method App 20140202771 - ZAHRADNIK; Anton F. ; et al. | 2014-07-24 |
| Hybrid Drill Bit App 20140151131 - Zahradnik; Anton F. ; et al. | 2014-06-05 |
| Hybrid drill bit and design method Grant 8,678,111 - Zahradnik , et al. March 25, 2 | 2014-03-25 |
| Hybrid drill bit Grant 8,459,378 - Zahradnik , et al. June 11, 2 | 2013-06-11 |
| System And Method For Adjusting Roller Cone Profile On Hybrid Bit App 20120111638 - NGUYEN; Don Q. ; et al. | 2012-05-10 |
| Hybrid Drill Bit App 20100288561 - Zahradnik; Anton F. ; et al. | 2010-11-18 |
| Roller cone drill bit with debris diverter plugs Grant 7,543,660 - Crawford , et al. June 9, 2 | 2009-06-09 |
| Hybrid Drill Bit And Design Method App 20090126998 - Zahradnik; Anton F. ; et al. | 2009-05-21 |
| Roller cone drill bit with debris flow paths through associated support arms Grant 7,484,572 - Blackman , et al. February 3, 2 | 2009-02-03 |
| Roller Cone Drill Bit With Enhanced Debris Diverter Grooves App 20070261891 - Williams; Mark E. ; et al. | 2007-11-15 |
| Roller Cone Drill Bit With Debris Diverter Plugs App 20070193779 - Crawford; Michael B. ; et al. | 2007-08-23 |
| Roller Cone Drill Bit With Debris Flow Paths Through Associated Support Arms App 20070193781 - Blackman; Mark P. ; et al. | 2007-08-23 |
| Pressure relief system and methods of use and making Grant 6,802,380 - Blackman October 12, 2 | 2004-10-12 |
| Roller cone bit with improved seal gland design Grant 6,752,223 - Panigrahi , et al. June 22, 2 | 2004-06-22 |
| Pressure relief system App 20030062200 - Blackman, Mark P. | 2003-04-03 |
| Roller cone bit with improved seal gland design App 20020027326 - Panigrahi, Amiya K. ; et al. | 2002-03-07 |
| Rotary drill bit with improved cutter and seal protection Grant 5,518,077 - Blackman , et al. May 21, 1 | 1996-05-21 |
| Rotary drill bit with improved cutter and seal protection Grant 5,452,771 - Blackman , et al. September 26, 1 | 1995-09-26 |
| Rotary drill bit with improved cutter Grant 5,429,200 - Blackman , et al. July 4, 1 | 1995-07-04 |
uspto.report is an independent third-party trademark research tool that is not affiliated, endorsed, or sponsored by the United States Patent and Trademark Office (USPTO) or any other governmental organization. The information provided by uspto.report is based on publicly available data at the time of writing and is intended for informational purposes only.
While we strive to provide accurate and up-to-date information, we do not guarantee the accuracy, completeness, reliability, or suitability of the information displayed on this site. The use of this site is at your own risk. Any reliance you place on such information is therefore strictly at your own risk.
All official trademark data, including owner information, should be verified by visiting the official USPTO website at www.uspto.gov. This site is not intended to replace professional legal advice and should not be used as a substitute for consulting with a legal professional who is knowledgeable about trademark law.
| 