Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4997317 | System and method for supporting a mining gallery | Burkhard Schonfeld, Erwin Mollmann, Werner Sonntag, Siegfried Sell | 1991-03-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4997317 | System and method for supporting a mining gallery | Burkhard Schonfeld, Erwin Mollmann, Werner Sonntag, Siegfried Sell | 1991-03-05 |