Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9458679 | Apparatus and method for damping vibration in a drill string | William Evans Turner, Mark Hutchinson, Mark Ellsworth Wassell, Carl Allison Perry, Martin E. Cobern | 2016-10-04 |