Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7017571 | Heat exchanger device | Stan Smits, Lutz Riefenstein | 2006-03-28 |
| 5915372 | Heat exchanger | Peter Wiedemann, Franz Koch | 1999-06-29 |
| 5295457 | Heat exchanger | Jaroslav Klouda, Franz Koch | 1994-03-22 |
| 5199416 | Hot air heat exchanger | Jaroslav Klouda, Franz Koch | 1993-04-06 |