Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4906132 | High-load underground dam | Thomas Oellers, Volker Kockritz, Frieder Hafner | 1990-03-06 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4906132 | High-load underground dam | Thomas Oellers, Volker Kockritz, Frieder Hafner | 1990-03-06 |