Patent Grant
D426556
| Number | Name | Date | Kind |
|---|---|---|---|
| 1459568 | Blum | Jun 1923 | |
| 2015581 | Armour | Sep 1935 | |
| 3278126 | Ratkowski | Oct 1966 | |
| 3627212 | Stanton | Dec 1971 | |
| 3727848 | Francis | Apr 1973 | |
| 3844494 | Hightower | Oct 1974 | |
| 3987971 | McClure | Oct 1976 | |
| 4000859 | Whitney | Jan 1977 | |
| 4056232 | Linnerz et al. | Nov 1977 | |
| 4141512 | Francis | Feb 1979 | |
| 4202504 | Cameron | May 1980 | |
| 4222530 | Whitney | Sep 1980 | |
| 4313575 | Stepanek | Feb 1982 | |
| 4519551 | Ceurvorst | May 1985 | |
| 4558826 | Martinek | Dec 1985 | |
| 4613088 | Hausler et al. | Sep 1986 | |
| 4650129 | Newell et al. | Mar 1987 | |
| 4915310 | Stelk | Apr 1990 | |
| 5022593 | Stelk | Jun 1991 | |
| 5072888 | Stelk | Dec 1991 | |
| 5141167 | Stelk | Aug 1992 | |
| 5169077 | Stelk | Dec 1992 | |
| 5205667 | Montgomery, Sr. | Apr 1993 | |
| 5598981 | Hellmich | Feb 1997 |
| Number | Date | Country |
|---|---|---|
| 2131722A | Jun 1984 | GBX |
