Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882462 | Control apparatus for heating, defrosting and/or cooking foods with microwave energy | Helmut Hess, Wolfgang Beifuss | 1989-11-21 |
| 4843218 | Heating element for thermal heating devices, especially cooking stations | Gunther Wittauer, Heinz Kotsch | 1989-06-27 |
| 4798938 | Temperature control apparatus for a baking oven | Gunther Wittauer, Helmut Knoll, Robert Dandl | 1989-01-17 |