| Number | Name | Date | Kind |
|---|---|---|---|
| D123691 | Dow et al. | Nov 1940 | |
| D276948 | Wacek et al. | Dec 1984 | |
| D296945 | Erickson, Jr. | Jul 1988 | |
| D362091 | Tomasiak et al. | Sep 1995 | |
| D372567 | Moine et al. | Aug 1996 | |
| D373862 | Stephens et al. | Sep 1996 | |
| D384448 | Stephens et al. | Sep 1997 | |
| 4993104 | Kasper et al. | Feb 1991 | |
| 5515573 | Frey | May 1996 |