Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856903 | Electronic device for determining a register error in multi-color printing machines | Helmut Kipphan, Willi Jeschke, Jean-Pierre Graf | 1989-08-15 |
| 4849423 | Purine derivatives, medicaments containing them and methods of treating cardiac insufficiencies and irregularities with them. | — | 1989-07-18 |