Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5701850 | Steam generator | Wolfgang Kohler, Rudolf Kral | 1997-12-30 |
| 5662070 | Once-through steam generator with a vertical gas flue of essentially vertically disposed tubes | Wolfgang Kastner, Wolfgang Kohler | 1997-09-02 |