Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4403887 | Method of covering the sump of underground cavities | Karl F. L. Gloria, Wilhelm Schuster, Jurgen Wittekind | 1983-09-13 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4403887 | Method of covering the sump of underground cavities | Karl F. L. Gloria, Wilhelm Schuster, Jurgen Wittekind | 1983-09-13 |