Patent Grant
D392852
| Number | Name | Date | Kind |
|---|---|---|---|
| D232341 | Mudde | Aug 1974 | |
| D290573 | Drummond, Jr. et al. | Jun 1987 | |
| 1977092 | Scurlock | Oct 1934 | |
| 1978695 | Clark | Oct 1934 | |
| 2030899 | Scurlock | Feb 1936 | |
| 2110921 | Scurlock | Mar 1938 | |
| 2431837 | Spotts et al. | Dec 1947 | |
| 2566430 | Sobers | Sep 1951 | |
| 2723763 | Baldwin | Nov 1955 | |
| 3322308 | Foster | May 1967 | |
| 3469732 | Foster | Sep 1969 | |
| 4162751 | Hetland et al. | Jul 1979 | |
| 4284200 | Bush et al. | Aug 1981 | |
| 4693399 | Hickman et al. | Sep 1987 | |
| 4775055 | Morse | Oct 1988 | |
| 4957219 | Robbins et al. | Sep 1990 | |
| 5031779 | Szenay et al. | Jul 1991 | |
| 5335804 | Flory | Aug 1994 | |
| 5524775 | Kaine | Jun 1996 |
