| Number | Name | Date | Kind |
|---|---|---|---|
| 2804928 | Farrar | Sep 1957 | A |
| 3642030 | Amick | Feb 1972 | A |
| 3687493 | Lock et al. | Aug 1972 | A |
| 3702144 | Loveland | Nov 1972 | A |
| 3894562 | Moseley et al. | Jul 1975 | A |
| 4452277 | Wells | Jun 1984 | A |
| 4962792 | Chaul | Oct 1990 | A |
| 5022438 | Faraon-Chaul | Jun 1991 | A |
| 5085058 | Aaron et al. | Feb 1992 | A |
| 5592974 | Grohs et al. | Jan 1997 | A |
| 5937906 | Kozyuk | Aug 1999 | A |
| 6119728 | Seidel-Peschmann et al. | Sep 2000 | A |
| Number | Date | Country |
|---|---|---|
| 493311 | Jul 1992 | DE |
| Entry |
|---|
| WO 91/17382 Turnbull, Caroline Nov. 1991. |