| Number | Name | Date | Kind |
|---|---|---|---|
| D300476 | Sestak | Mar 1989 | |
| D301644 | Sestak | Jun 1989 | |
| 4439157 | Breglia et al. | Mar 1984 | |
| 4737972 | Schoolman | Apr 1988 | |
| 4952024 | Gale | Aug 1990 | |
| 5158212 | Sirhan | Oct 1992 | |
| 5320534 | Thomas | Jun 1994 | |
| 5347400 | Hunter | Sep 1994 |
| Entry |
|---|
| Virtual Research, vol. 2, Issue 5, Jun. 1993 p. 5. |
| Hong Kong Enterprise, Oct. 1994, p. 277. |
| Video Review, Jun. 1993, p. 25. |