Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7639150 | Method and a device for detecting slag | Willy Ohlsson, Håkan Kelvesjö | 2009-12-29 |
| 7013949 | Metal flow control | Michel Cervantes, Håkan Kelvesjö, Willy Ohlsson | 2006-03-21 |