Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882365 | Polymerizable radiopaque dental composition | Oswald Gasser | 1989-11-21 |
| 4867790 | Dental composition containing an aziridine compound and method of preparation | Peter Jochum, Wolf-Dietrich Zahler, Oswald Gasser, Gunther Lechner | 1989-09-19 |