Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4401397 | Method and device for installing a shaft lining in shafts through an aquiferous formation | Albrecht Sommer | 1983-08-30 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4401397 | Method and device for installing a shaft lining in shafts through an aquiferous formation | Albrecht Sommer | 1983-08-30 |