Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5449422 | Method and device for the heat treatment of heat treatable material in an industrial furnace | Bernd Onderka, Franz Engelberg, Richard Breisinger | 1995-09-12 |
| 5301929 | Conveying device for push-type or continuous-heating furnaces | Franz Engelberg | 1994-04-12 |