Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7513451 | Refining element | Nils Virving, Lars Holmsten | 2009-04-07 |
| 5526992 | Refining element of a disc refiner | Anders Hawen, Christer Hedlund, Christer Nastren, Lennart Rohden, Nils Virving | 1996-06-18 |