Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11002102 | Plug and production tubing for a petroleum well | Erling Kleppa | 2021-05-11 |
| 9611720 | Valve arrangement and method of operating the same | Erling Kleppa, Kristian Harestad | 2017-04-04 |
| 9587463 | Valve system | Magnar Tveiten, Erling Kleppa, Øyvind Stokka | 2017-03-07 |
| 9140096 | Valve system | Magnar Tveiten, Erling Kleppa, Øyvind Stokka | 2015-09-22 |
| 8701779 | Bellows valve | Erling Kleppa, Øyvind Stokka | 2014-04-22 |
| 8684073 | Device for injection and stimulation of fluids in a well bore | Øyvind Stokka, Erling Kleppa, Magnar Tveiten | 2014-04-01 |
| 8291981 | Shear open valve | Magnar Tveiten, Øyvind Stokka, Erling Kleppa, Tom Norland | 2012-10-23 |