Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7468158 | Corrosion inhibitor for protecting metallic materials in strongly alkaline medium | Lutz Heuer, Stylianos Savakis, Eberhard Zirngiebl | 2008-12-23 |
| 5787874 | Gas-fired ceramic-cooktop burner | Gunter Krohn, Wilhelm Cramer | 1998-08-04 |
| 4993401 | Control system for glass-top cooking unit | Gunter Krohn, Wilhelm Cramer | 1991-02-19 |
| 4951646 | Ventilated glass-top cooking unit | Gunter Krohn, Wilhelm Cramer | 1990-08-28 |
| 4333917 | Process of producing sulfuric acid | Karl-Heinz Dorr, Hugo Grimm, Ulrich Sander, Michael Tacke, Waldemar Weber | 1982-06-08 |