Patent Grant
D308582
| Number | Name | Date | Kind |
|---|---|---|---|
| D190461 | Worfold | May 1961 | |
| D194221 | Zbikowski | Dec 1962 | |
| D227819 | Kotzar | Jul 1973 | |
| D254520 | Amirault | Mar 1980 | |
| D254638 | Bay, Jr. | Apr 1980 | |
| 2033691 | Douglass | Mar 1936 | |
| 2610323 | Johnson | Sep 1952 | |
| 2736027 | Parmelee | Feb 1956 | |
| 2774970 | DuBois | Dec 1956 | |
| 3152588 | Rogowski | Oct 1964 | |
| 3772707 | Alosi et al. | Nov 1973 | |
| 3828366 | Conrad et al. | Aug 1974 | |
| 4625341 | Broersma | Dec 1986 | |
| 4674136 | Ladewig | Jun 1987 | |
| 4701129 | Hazard | Oct 1987 |
