Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11156054 | Annular blowout preventer | John L. Alsup, Bolie C. Williams, III, Erik Norbom, THOR ARNE HAVERSTAD | 2021-10-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11156054 | Annular blowout preventer | John L. Alsup, Bolie C. Williams, III, Erik Norbom, THOR ARNE HAVERSTAD | 2021-10-26 |