Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6052901 | Process for production of lightweight sheet-steel wheel for vehicles | Thomas Stegemann | 2000-04-25 |
| 4902872 | Process for the production of a shaped part from pieces of sheet metal of different thicknesses | Wilfried Prange | 1990-02-20 |
| 4827100 | Process for the production of a shaped parts from pieces of sheet metal of different thicknesses | Wilfried Prange | 1989-05-02 |
| 4650954 | Process for the butt-welding of especially deep-drawable steel sheets or steel strips galvanized at least on one side | Wilfried Prange | 1987-03-17 |