Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6672227 | Arrangement for cleaning, airflow control and pushing away melt in air ports of incineration boilers | — | 2004-01-06 |
| 5983930 | Air supply valve | — | 1999-11-16 |
| 5755187 | Steam boiler with externally positioned superheating means | Ola Herstad | 1998-05-26 |
| 5460127 | Steam boiler | Ola Herstad | 1995-10-24 |