Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855517 | Process for preparing aromatic bromine compounds | Hans Joachim Metz | 1989-08-08 |
| 4847354 | Shaped structure of aromatic copolyamide from aromatic diamine mixture | Gunter Keil, Franz Jakob, Friedrich Herold | 1989-07-11 |