Barr; John D.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Barr; John D..The latest application filed is for "system and method for security of computing devices".
- Barr; John D. - Cheltenham GB
- Barr, John D. - San Jose CA
- Barr; John D. - Gloucestershire GB3
- Barr; John D - Cheltenham GB2
- Barr; John D. - Cheltenham Gloucestershire GB2
- Barr; John D. - Gloucester GB2
| Patent | Date |
|---|---|
| Measurement of curvature of a subsurface borehole, and use of such measurement in directional drilling Grant 6,877,241 - Barr , et al. April 12, 2 | 2005-04-12 |
| System and method for security of computing devices App 20040039924 - Baldwin, Robert W. ; et al. | 2004-02-26 |
| Measurement of curvature of a subsurface borehole, and use of such measurement in directional drilling App 20030037963 - Barr, John D. ; et al. | 2003-02-27 |
| Systems and methods for computer device authentication App 20030037237 - Abgrall, Jean-Paul ; et al. | 2003-02-20 |
| Steerable rotary drilling systems Grant 6,089,332 - Barr , et al. July 18, 2 | 2000-07-18 |
| Steerable rotary drilling systems and method of operating such systems Grant 5,803,185 - Barr , et al. September 8, 1 | 1998-09-08 |
| Steerable rotary drilling systems Grant 5,706,905 - Barr January 13, 1 | 1998-01-13 |
| System and method of controlling rotation of a downhole instrument package Grant 5,695,015 - Barr , et al. December 9, 1 | 1997-12-09 |
| Method of operating a steerable rotary drilling system Grant 5,685,379 - Barr , et al. November 11, 1 | 1997-11-11 |
| Modulated bias unit for rotary drilling Grant 5,582,259 - Barr December 10, 1 | 1996-12-10 |
| Modulated bias units for steerable rotary drilling systems Grant 5,553,678 - Barr , et al. September 10, 1 | 1996-09-10 |
| Modulated bias unit for rotary drilling Grant 5,520,255 - Barr , et al. May 28, 1 | 1996-05-28 |
| Steerable rotary drilling systems Grant 5,265,682 - Russell , et al. November 30, 1 | 1993-11-30 |
| Rotary drills bits Grant 5,165,494 - Barr November 24, 1 | 1992-11-24 |
| Methods of manufacturing cutter assemblies for rotary drill bits Grant 5,101,691 - Barr April 7, 1 | 1992-04-07 |
| Rotary drill bits Grant 5,099,934 - Barr March 31, 1 | 1992-03-31 |
| Cutting elements for rotary drill bits Grant 5,061,293 - Barr , et al. October 29, 1 | 1991-10-29 |
| Cutting elements for rotary drill bits Grant 5,025,874 - Barr , et al. June 25, 1 | 1991-06-25 |
| Cutting elements for rotary drill bits Grant 4,995,887 - Barr , et al. February 26, 1 | 1991-02-26 |
| Relating to rotary drill bits Grant 4,942,933 - Barr , et al. July 24, 1 | 1990-07-24 |
| Cutting structures for rotary drill bits Grant 4,898,252 - Barr February 6, 1 | 1990-02-06 |
| Rotary drill bits Grant 4,804,049 - Barr February 14, 1 | 1989-02-14 |
| Manufacture of rotary drill bits Grant 4,780,274 - Barr * October 25, 1 | 1988-10-25 |
| Rotary drill bits Grant 4,733,735 - Barr , et al. March 29, 1 | 1988-03-29 |
| Rotary drill bits Grant 4,727,946 - Barr , et al. * March 1, 1 | 1988-03-01 |
| Drill bit and method of manufacture Grant 4,711,144 - Barr , et al. * December 8, 1 | 1987-12-08 |
| Rotary drill bits with nozzle former and method of manufacturing Grant 4,694,919 - Barr September 22, 1 | 1987-09-22 |
| Rotary drill bits and cutting elements for such bits Grant 4,679,639 - Barr , et al. July 14, 1 | 1987-07-14 |
| Drill bit and cutter therefor Grant 4,676,324 - Barr , et al. June 30, 1 | 1987-06-30 |
| Drag type drill bit Grant 4,660,659 - Short, Jr. , et al. * April 28, 1 | 1987-04-28 |
| Drill bit and cutter therefor Grant 4,640,375 - Barr , et al. * February 3, 1 | 1987-02-03 |
| Manufacture of rotary drill bits Grant 4,624,830 - Barr November 25, 1 | 1986-11-25 |
| Drill bit manufacturing method Grant 4,605,157 - Barr , et al. August 12, 1 | 1986-08-12 |
| Drag bit and cutters Grant 4,593,777 - Barr * June 10, 1 | 1986-06-10 |
| Rotary drill bits Grant 4,577,706 - Barr March 25, 1 | 1986-03-25 |
| Drag bit and cutters Grant 4,558,753 - Barr December 17, 1 | 1985-12-17 |
| Drill bit Grant 4,505,342 - Barr , et al. March 19, 1 | 1985-03-19 |
| Rotary drill bits Grant 4,382,477 - Barr May 10, 1 | 1983-05-10 |
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