| Number | Name | Date | Kind |
|---|---|---|---|
| D268849 | Shuman | May 1983 | |
| 1648103 | Ball | Nov 1927 | |
| 1839016 | Dodd | Dec 1931 | |
| 1848950 | Hammes | Mar 1932 | |
| 2049855 | Meyer | Aug 1936 | |
| 2869812 | Hamel | Jan 1959 | |
| 3820262 | Dewsnap | Jun 1974 | |
| 3950874 | Diggs | Apr 1976 | |
| 3956837 | Itano | May 1976 | |
| 4292749 | Thomas | Oct 1981 | |
| 4749159 | Hoff | Jun 1988 | |
| 4876810 | Piana et al. | Oct 1989 | |
| 4899474 | Piana et al. | Feb 1990 | |
| 5056248 | Blanchard | Oct 1991 | |
| 5170578 | Pampel | Dec 1992 | |
| 5257472 | Harnois et al. | Nov 1993 | |
| 5331757 | Ernest et al. | Jul 1994 | |
| 5388359 | DeWitt | Feb 1995 | |
| 5400992 | Pohl | Mar 1995 |
| Entry |
|---|
| "Spring Clamp", SC11 and Spring Clamp No. SC8, last page (8), Catalog No. 439 entitled Sign Holders & Accessories, Feb. 1995. |