Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4917532 | Grid plate | Wolfgang Schibalski, Walter Burcky, Theo Rydman | 1990-04-17 |
| 4826351 | Grid plate of plastic material | Klaus D. Feyerabend, Bruno Heitzmann, Alfred Lieberenz, Harry Schimmel | 1989-05-02 |