| Number | Name | Date | Kind |
|---|---|---|---|
| D310615 | Kitai et al. | Sep 1990 | |
| D311848 | Mikami et al. | Nov 1990 | |
| D314687 | Kim | Feb 1991 | |
| D325147 | Watanabe et al. | Apr 1992 | |
| D330306 | Kim | Oct 1992 | |
| D341515 | Hamada et al. | Nov 1993 | |
| D346303 | Kaneko | Apr 1994 | |
| D351759 | Maruyama et al. | Oct 1994 | |
| D354195 | Kaneko | Jan 1995 | |
| D357384 | Maeda et al. | Apr 1995 | |
| D358061 | Duquaine et al. | May 1995 | |
| D358291 | Lee | May 1995 | |
| D358528 | Hyun | May 1995 |