Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4679429 | Hydraulic ram stroke monitoring apparatus | Gerhard Merten, Horst Schlusener | 1987-07-14 |
| 4462637 | Control apparatus for inclination of longwall guide | Egon Pfefferle | 1984-07-31 |