Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4236850 | Shield timbering frame for timbering mines | Manfred Koppers | 1980-12-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4236850 | Shield timbering frame for timbering mines | Manfred Koppers | 1980-12-02 |