| Number | Name | Date | Kind |
|---|---|---|---|
| D217528 | Fischer | May 1970 | |
| D286328 | Ullmann | Oct 1986 | |
| D306498 | Uemura et al. | Mar 1990 | |
| D310429 | Anema | Sep 1990 | |
| D311972 | Yonesawa et al. | Nov 1990 | |
| D319895 | Ullmann | Sep 1991 | |
| D321413 | Elkerbout | Nov 1991 | |
| D328367 | Ishibashi et al. | Jul 1992 | |
| D340540 | Nakashima et al. | Oct 1993 | |
| D343923 | Nakashima et al. | Feb 1994 | |
| D345822 | Ullmann | Apr 1994 |