Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9732981 | Method and equipment for heat recovery | Erling Naess, Otto Kristian Sonju, Bjorn Petter Moxnes | 2017-08-15 |
| 8292615 | Single stage gaseous fuel burner with low NOx emissions | Øystein Spangelo, Otto Kristian Sonju, Mario Ditaranto | 2012-10-23 |