Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9074446 | System and method for controlling the pressure in a hydrocarbon well | Per Herbert Kristensen, Knut A. Sveen, Morten Bøhlerengen | 2015-07-07 |
| 6470969 | Arrangement on a floating device for overhauling offshore hydrocarbon wells | Leif Harald Pettersen, Per Herbert Kristensen | 2002-10-29 |
| 6390732 | Jack-up, movable drilling platform having a telescoping outrigger | Per Herbert Kristensen, Leiken Dahl | 2002-05-21 |