Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7849934 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Eric C. Sullivan, Daryl L. Pritchard, Keith Glasgow, Paul J. Lutes | 2010-12-14 |
| 7836792 | System, method and apparatus for enhanced cutting element retention and support in a rock bit | Eric C. Sullivan | 2010-11-23 |
| 7621346 | Hydrostatic bearing | Eric C. Sullivan | 2009-11-24 |
| 7604072 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Eric C. Sullivan, Daryl L. Pritchard, Keith Glasgow, 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, Keith Glasgow, 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, Keith Glasgow, 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, Keith Glasgow, Paul J. Lutes | 2009-03-03 |