Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5190414 | Walking prop for mine tunnels | Alois Scheunert, Peter Kroninger, Peter E. Rose, Alfred Bollmann | 1993-03-02 |
| 4755083 | Adjustable cap unit | Ernst-Gunter Nerlich | 1988-07-05 |
| 4487531 | Travelling bracket | Ernst-G/u/ nter Nerlich, Peter Kr/o/ ninger | 1984-12-11 |
| 4309130 | Mine roof support | — | 1982-01-05 |