| Number | Name | Date | Kind |
|---|---|---|---|
| D331411 | Kassouni | Dec 1992 | |
| D336636 | Veno et al. | Jun 1993 | |
| 3233071 | Buzzell | Feb 1966 | |
| 3499129 | Hulteen et al. | Mar 1970 | |
| 3594525 | Miller | Jul 1971 | |
| 3662128 | Neudorfer et al. | May 1972 | |
| 4051340 | Wolski | Sep 1977 | |
| 4095061 | Bridges | Jun 1978 | |
| 4596906 | Chabala et al. | Jun 1986 | |
| 4622443 | Mooz | Nov 1986 | |
| 5249097 | Bassin | Sep 1993 |