Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4810038 | Bunker for surface mines and method of forming a storage area for the bunker | Gerd Schroder | 1989-03-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4810038 | Bunker for surface mines and method of forming a storage area for the bunker | Gerd Schroder | 1989-03-07 |