Patent Grant
D333420
| Number | Name | Date | Kind |
|---|---|---|---|
| 3189313 | Burns et al. | Jun 1965 | |
| 3620171 | Brenia et al. | Nov 1971 | |
| 3652050 | Marrujo et al. | Mar 1972 | |
| 3677195 | Prete, Jr. | Jul 1972 | |
| 3810534 | Prete, Jr. | May 1974 | |
| 4026218 | Prete, Jr. et al. | May 1977 | |
| 4062298 | Weik | Dec 1977 | |
| 4109891 | Grendahl | Aug 1978 | |
| 4114947 | Nelson | Sep 1978 | |
| 4230432 | Howell | Oct 1988 | |
| 4256424 | Knox et al. | Mar 1981 | |
| 4396175 | Long et al. | Aug 1983 | |
| 4493470 | Engel | Jan 1985 | |
| 4509888 | Sheek | Apr 1985 | |
| 4688843 | Hall | Aug 1987 | |
| 4708549 | Jensen | Nov 1987 | |
| 4718719 | Brennan | Jan 1988 | |
| 4771969 | Dowd | Sep 1988 | |
| 4911381 | Cannon et al. | Mar 1990 | |
| 5058829 | Bentley | Oct 1991 |
