| Type | Equivalent | Publication No. | Date | Type | EP0346874 | Global Dossier
| 18.09.1991 | A3 | EP0346874 | 20.12.1989 | A2 | Priority number | Date | US20760788 | 15.06.1988 | Type | Equivalent | Publication No. | Date | Type | US4899382 | 06.02.1990 | A | Priority number | Date | US20760788 | 15.06.1988 |