Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4377201 | Arrangement in a heat recovery unit | Rolf Kruse, Karl A. Jansson | 1983-03-22 |
| 4306890 | Apparatus for cleaning of filter elements | Kai A. Valli | 1981-12-22 |
| 4227903 | Filter cell apparatus | Holger A. Persson | 1980-10-14 |