| Number | Name | Date | Kind |
|---|---|---|---|
| D275653 | Crutchfield | Sep 1984 | |
| D288938 | Klodt | Mar 1987 | |
| D289262 | Goetz et al. | Apr 1987 | |
| D308340 | Ilsen et al. | Jun 1990 | |
| D311334 | Flynn et al. | Oct 1990 | |
| D316674 | Poirier | May 1991 | |
| D319016 | Kahl | Aug 1991 | |
| D326345 | Mandell et al. | May 1992 | |
| D328425 | Brightbill | Aug 1992 | |
| D329331 | Hobson | Sep 1992 | |
| D329747 | Embree | Sep 1992 | |
| D330161 | Schuh | Oct 1992 | |
| D330329 | Brightbill | Oct 1992 | |
| D334662 | van Berne | Apr 1993 | |
| D342609 | Brightbill | Dec 1993 | |
| D348394 | Dreyer | Jul 1994 | |
| D351284 | Kruger | Oct 1994 | |
| D354435 | Krupa | Jan 1995 | |
| D362117 | Koenig et al. | Sep 1995 | |
| D363604 | Koenig et al. | Oct 1995 | |
| D363669 | Pennoyer | Oct 1995 | |
| 4917261 | Borst | Apr 1990 |