Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820709 | 6-thioxanthine derivatives | — | 1989-04-11 |
| 4813955 | Multifocal, especially bifocal, intraocular, artificial ophthalmic lens | Manfred Achatz, Jurgen Strobel | 1989-03-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820709 | 6-thioxanthine derivatives | — | 1989-04-11 |
| 4813955 | Multifocal, especially bifocal, intraocular, artificial ophthalmic lens | Manfred Achatz, Jurgen Strobel | 1989-03-21 |