| Number | Name | Date | Kind |
|---|---|---|---|
| D177053 | Kofford | Mar 1956 | |
| D234145 | Peppler et al. | Jan 1975 | |
| D250422 | Mallinson | Nov 1978 | |
| 2848013 | Kofford | Aug 1958 | |
| 3353518 | Hart | Nov 1967 | |
| 3405686 | Hart | Oct 1968 | |
| 3862621 | Peppler et al. | Jan 1975 | |
| 3952706 | Hart | Apr 1976 | |
| 4185590 | Hostetler | Jan 1980 | |
| 4221188 | Hostetler | Sep 1980 | |
| 4248178 | Kneubuehl | Feb 1981 | |
| 4471722 | Dube et al. | Sep 1984 |