Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883322 | Mining and conveying apparatus | Gunter Blumenthal, Kurt Plaga | 1989-11-28 |
| 4620748 | Method of and arrangement for loosening, loading and transporting of stratified minerals in underground elongated front longwalls | Peter Heintzmann, Manfred Koppers, Karlheinz Bohnes | 1986-11-04 |
| 4437562 | Chain bucket conveyor | Manfred Koppers, Karlheinz Bohnes | 1984-03-20 |
| 4183700 | Walking mine support | Gerhard von Klinggraff, Karlheinz Bohnes, Peter Marr | 1980-01-15 |