| Number | Name | Date | Kind |
|---|---|---|---|
| RE30444 | Spann | Dec 1980 | |
| D225472 | Lowrey et al. | Dec 1972 | |
| D287641 | Schaefer | Jan 1987 | |
| D337217 | Strickland | Jul 1993 | |
| 3903878 | Spann | Sep 1975 | |
| 3931654 | Spann | Jan 1976 | |
| 3939829 | Spann | Feb 1976 | |
| 3946451 | Spann | Mar 1976 | |
| 4135504 | Spann | Jan 1979 | |
| 4210317 | Spann | Jul 1980 | |
| 4327714 | Spann | May 1982 | |
| 4433678 | Spann | Feb 1984 | |
| 4573456 | Spann | Mar 1986 |
| Entry |
|---|
| O.R. Positioners Ad, Foot ProtectorA, top right side of page. |