Issued Patents 2011
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7997357 | System and method for damping vibration in a drill string | Mark Ellsworth Wassell, Daniel E. Burgess, Carl Allison Perry | 2011-08-16 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7997357 | System and method for damping vibration in a drill string | Mark Ellsworth Wassell, Daniel E. Burgess, Carl Allison Perry | 2011-08-16 |