Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10156095 | Top drive and power swivel with high pressure seals and automatic refilling lubrication reservoir | David A. McMahon | 2018-12-18 |
| 9915108 | Dual control hydraulic circuit for a tilting power swivel | — | 2018-03-13 |