Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8162077 | Drill bit with weight and torque sensors | Sorin Gabriel Teodorescu, Eric C. Sullivan, Tu Tien Trinh, Daryl L. Pritchard, Xiaomin Cheng | 2012-04-24 |
| 8100196 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Eric C. Sullivan, Daryl L. Pritchard, Tu Tien Trinh, Paul J. Lutes | 2012-01-24 |
| 7849934 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Eric C. Sullivan, Daryl L. Pritchard, Tu Tien Trinh, Paul J. Lutes | 2010-12-14 |
| 7604072 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Eric C. Sullivan, Daryl L. Pritchard, Tu Tien Trinh, Paul J. Lutes | 2009-10-20 |
| 7510026 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Eric C. Sullivan, Daryl L. Pritchard, Tu Tien Trinh, Paul J. Lutes | 2009-03-31 |
| 7506695 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Eric C. Sullivan, Daryl L. Pritchard, Tu Tien Trinh, Paul J. Lutes | 2009-03-24 |
| 7497276 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Eric C. Sullivan, Daryl L. Pritchard, Tu Tien Trinh, Paul J. Lutes | 2009-03-03 |