| Number | Name | Date | Kind |
|---|---|---|---|
| D277190 | Sadler | Jan 1985 | |
| D320408 | Seid et al. | Oct 1991 | |
| 4657163 | Cats | Apr 1987 | |
| 4782986 | Loesche | Nov 1988 | |
| 4873811 | Izumitani et al. | Oct 1989 | |
| 4886198 | de Larosiere | Dec 1989 | |
| 4997134 | MacGregor | Mar 1991 | |
| 5071080 | Herbst et al. | Dec 1991 | |
| 5072869 | Padgett | Dec 1991 |