Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887935 | Method of controlling the movement of a longwall excavation front, especially the face or breast of a coal seam | Manfred Koppers, Kuno Guse | 1989-12-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887935 | Method of controlling the movement of a longwall excavation front, especially the face or breast of a coal seam | Manfred Koppers, Kuno Guse | 1989-12-19 |