 
                 Patent Grant
 Patent Grant
                     D408419
 D408419
                    | Number | Name | Date | Kind | 
|---|---|---|---|
| D205170 | Demler, Sr. | Jun 1966 | |
| D257775 | Allen | Jan 1981 | |
| D290259 | van der Wyk | Jun 1987 | |
| 2622929 | Neufeld | Dec 1952 | |
| 4705076 | Krechel et al. | Nov 1987 | |
| 4709947 | Kniess | Dec 1987 | |
| 5287841 | Forsythe et al. | Feb 1994 | |
| 5427150 | Skaer | Jun 1995 |