Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4618282 | Composition and a method for covering the sump in cavities | Alexandru B. Costinescu-Tataranu, Wilhelm Schuster, Jurgen Wittekind | 1986-10-21 |
| 4403887 | Method of covering the sump of underground cavities | Alexander-Barbu Costinescu-Tataranu, Wilhelm Schuster, Jurgen Wittekind | 1983-09-13 |