Issued Patents 2016
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9303469 | Top drive with dual opening elevator | — | 2016-04-05 |
| 9303470 | Drilling rig with top drive with dual opening elevator | — | 2016-04-05 |
| 9249655 | Control system for a top drive | Stephen Lee Gerhauser, Jr. | 2016-02-02 |