| Number | Name | Date | Kind |
|---|---|---|---|
| D. 376822 | Osterhout | Dec 1996 | |
| D. 397368 | Rissman | Aug 1998 | |
| D. 414218 | Chao | Sep 1999 | |
| 4438926 | Yokoi et al. | Mar 1984 | |
| 5184830 | Okada et al. | Feb 1993 | |
| 5672108 | Lam et al. | Sep 1997 | |
| 6042478 | Ng | Mar 2000 |
| Entry |
|---|
| HongKong Enterprise, p. 334, Oct. 1996. |