Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4960306 | Open-cut mining cutter | Bernhard Wiechers | 1990-10-02 |
| 4215825 | Crusher with impacting bars | Ulrich Fritz, Willibald F. G. Kamm, Udo Sudmersen | 1980-08-05 |
| 4206793 | Process for improving the impregnability of wood | — | 1980-06-10 |