| Number | Name | Date | Kind |
|---|---|---|---|
| D293813 | Fischer | Jan 1988 | |
| D293814 | Muck et al. | Jan 1988 | |
| D297162 | Muck et al. | Aug 1988 | |
| D297163 | Blanc et al. | Aug 1988 | |
| D298163 | Downs | Oct 1988 | |
| D317197 | Gocke et al. | May 1991 | |
| D317198 | Gocke et al. | May 1991 | |
| D317357 | Blanc et al. | Jun 1991 | |
| D317647 | Jung et al. | Jun 1991 | |
| D318104 | Blanc et al. | Jul 1991 | |
| D318523 | Blanc et al. | Jul 1991 | |
| D319688 | Gocke et al. | Sep 1991 | |
| D319870 | Gocke et al. | Sep 1991 | |
| D320067 | Gocke et al. | Sep 1991 | |
| D322842 | Jung et al. | Dec 1991 | |
| D322846 | Gocke et al. | Dec 1991 | |
| 4624020 | Abderhalden et al. | Nov 1986 | |
| 4689840 | Muck et al. | Sep 1987 | |
| 4847927 | Blanc | Jul 1989 |