| Number | Name | Date | Kind |
|---|---|---|---|
| D375798 | Boothby | Nov 1996 | |
| 4567780 | Oppenlander et al. | Feb 1986 | |
| 4616514 | Magnussen, Jr. et al. | Oct 1986 | |
| 5084241 | Parker | Jan 1992 | |
| 5187990 | T. et al. | Feb 1993 | |
| 5614153 | Homberg | Mar 1997 | |
| 5849248 | Homberg | Dec 1998 | |
| 5998218 | Conley et al. | Dec 1999 |