Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5787874 | Gas-fired ceramic-cooktop burner | Wilhelm Cramer, Helmut Diekmann | 1998-08-04 |
| 4993401 | Control system for glass-top cooking unit | Helmut Diekmann, Wilhelm Cramer | 1991-02-19 |
| 4951646 | Ventilated glass-top cooking unit | Helmut Diekmann, Wilhelm Cramer | 1990-08-28 |
| 4846144 | Cooking range | Dietmar Kaselow | 1989-07-11 |