Issued Patents 2011
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7987925 | Method and apparatus for collecting drill bit performance data | Paul E. Pastusek, Eric C. Sullivan, Daryl L. Pritchard, R. Keith Glasgow, Jr., Tu Tien Trinh | 2011-08-02 |