Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5190414 | Walking prop for mine tunnels | Hans-Ferdinand Bemmerl, Alois Scheunert, Peter Kroninger, Peter E. Rose | 1993-03-02 |
| 4309131 | Mine roof support | — | 1982-01-05 |
| 4280734 | Arrangement for controlled engagement of the tools of a mining machine with a mine face | Gunter Blumenthal | 1981-07-28 |
| 4252477 | Mine roof support | — | 1981-02-24 |