| Number | Name | Date | Kind |
|---|---|---|---|
| 3124292 | Stegner | Mar 1964 | |
| 3495756 | Achermann et al. | Dec 1970 | |
| 3794550 | Taillie | Feb 1974 | |
| 3930700 | Figueres | Jan 1976 | |
| 4175777 | Horn | Nov 1979 | |
| 4469353 | Anarwala | Sep 1984 | |
| 4545838 | Minkus | Oct 1985 | |
| 4549750 | Stone et al. | Oct 1985 | |
| 4616854 | Landrum et al. | Oct 1986 | |
| 4626669 | Davis et al. | Dec 1986 |
| Entry |
|---|
| PTO Form 270 Package Oct. 1984. |