Patent Grant
D420891
| Number | Name | Date | Kind |
|---|---|---|---|
| 936824 | Simpson et al. | Oct 1909 | |
| 972306 | Wilcox | Oct 1910 | |
| 1002350 | Wolcox | Sep 1911 | |
| 1047097 | MacNab | Dec 1912 | |
| 2712864 | Clevett, Jr. | Jul 1955 | |
| 2841256 | Clevett, Jr. | Jul 1958 | |
| 3080024 | Clevett, Jr. | Mar 1963 | |
| 3888057 | Zubke | Jun 1975 | |
| 3969854 | Deike | Jul 1976 | |
| 4003169 | Young, II | Jan 1977 | |
| 4574539 | Deike | Mar 1986 | |
| 4688360 | Luong et al. | Aug 1987 | |
| 4738063 | Alsop | Apr 1988 | |
| 4802317 | Chandler | Feb 1989 | |
| 5123779 | Miller | Jun 1992 | |
| 5175966 | Remke et al. | Jan 1993 | |
| 5322386 | Trangsrud | Jun 1994 | |
| 5720579 | Trangsrud | Feb 1998 | |
| 5775037 | James | Jul 1998 |
