Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885281 | Sucralfate suspension | Ullrich Hanstein | 1989-12-05 |
| 4834030 | Diesel internal combustion engine | Wolfgang Strusch, Ernst-Siegfried Hartmann, Herbert Schleiermacher, Juergen Wahnschaffe | 1989-05-30 |