Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9670745 | High pressure seals for wellhead pressure control fittings | Keith C. Johansen | 2017-06-06 |
| 9644443 | Remotely-operated wellhead pressure control apparatus | Keith C. Johansen | 2017-05-09 |