Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4478457 | Longwall mining apparatus for working thick seams | — | 1984-10-23 |
| 4186970 | Sectional conveyor with sectional rack fixed on the conveyor at only a single location | Otto Minke | 1980-02-05 |
| 4184715 | Rack device for a drum cutter mining machine | — | 1980-01-22 |