| Number | Name | Date | Kind |
|---|---|---|---|
| D248491 | Reiss | Jul 1978 | |
| D267587 | Ambrosio et al. | Jan 1983 | |
| D297570 | Ambrose et al. | Sep 1988 | |
| D302296 | Harmony | Jul 1989 | |
| 4840618 | Marvel | Jun 1989 | |
| 4946447 | Hardcastle et al. | Aug 1990 | |
| 4997422 | Chow et al. | May 1991 | |
| 5019051 | Hake | May 1991 | |
| 5057088 | Narayanan | Oct 1991 |