Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4918509 | Gate turn-off thyristor | Heinrich Schlangenotto, Wolf-Dieter Nowak | 1990-04-17 |
| 4730578 | Method for operating a heating boiler plant and apparatus suitable therefor | Alfred Michel, Hana Kostka, Louis Gosteli | 1988-03-15 |
| 4230443 | Vaporizing burner | Peter Gulden, Hana Kostka, Alfred Michel | 1980-10-28 |