Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8020627 | Equalized load distribution slips for spider and elevator | Karsten Heidecke | 2011-09-20 |
| 7918273 | Top drive casing system | Randy Gene Snider, John Timothy Allen, Kevin L. Gray, Gary Thompson | 2011-04-05 |