Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882362 | Foamed microbeads and a process for their preparation | Norbert Weimann, Manfred Dahm, Ulrich Nehen | 1989-11-21 |
| 4804687 | Foamed microbeads and a process for their preparation | Norbert Weimann, Manfred Dahm, Ulrich Nehen | 1989-02-14 |