Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5647640 | Continuously operating mining machines with plow and conveyor chains and method of operating same | Peter Heintzmann | 1997-07-15 |
| 5624162 | Long-wall mining machine with a working chain | Peter Kroninger, Bernd Holling, Roland Becker | 1997-04-29 |