Patent Grant
D306043
| Number | Name | Date | Kind |
|---|---|---|---|
| D289131 | Stehouwer | Apr 1987 | |
| 2023102 | Sauer | Dec 1935 | |
| 2305426 | Howell | Dec 1942 | |
| 2847774 | Brooks | Aug 1958 | |
| 2907586 | Paxton et al. | Oct 1959 | |
| 3130509 | Brooks | Apr 1964 | |
| 3164250 | Paxton | Jan 1965 | |
| 3270872 | Paxton | Sep 1966 | |
| 3270873 | Paxton | Sep 1966 | |
| 3417912 | Paxton | Dec 1968 | |
| 3439867 | Paxton | Apr 1969 | |
| 3446344 | Paxton | May 1969 | |
| 3775882 | Wheeler | Dec 1973 | |
| 3822441 | Paxton | Jul 1974 | |
| 4216598 | Newbert | Aug 1980 | |
| 4379372 | Alexander et al. | Apr 1983 | |
| 4428134 | Arnold et al. | Sep 1983 |
