Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10260778 | Geothermal power plant | Otto Kristian Sønju, Bjørn Halmrast | 2019-04-16 |
| 8354625 | Apparatuses for and methods of forge welding elongated articles with electrodes and an induction coil | Bjørn Halmrast, Kjell Magne Rabben | 2013-01-15 |