Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5382328 | Installation for processing waste oil | Heinz-Gunter Rittscher | 1995-01-17 |
| 4461600 | Method of and device for solidifying rock in mine tunnels and the like | Hans Norkus | 1984-07-24 |