Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11156054 | Annular blowout preventer | John L. Alsup, Bolie C. Williams, III, J. GILBERT NANCE, Erik Norbom | 2021-10-26 |
| 10519739 | Ram for a blowout preventer and a blowout preventer provided with rams | Erik Norbom, J. GILBERT NANCE, John L. Alsup, Bolie C. Williams, III | 2019-12-31 |