| Number | Name | Date | Kind |
|---|---|---|---|
| D217172 | Schumm | Apr 1970 | |
| 909480 | Tothill | Jan 1909 | |
| 3556522 | Gale | Jan 1971 | |
| 3715120 | Peltola | Feb 1973 | |
| 3780469 | Hancovsky | Dec 1973 | |
| 3831934 | Hancovsky | Aug 1974 | |
| 4149710 | Rouchard | Apr 1979 | |
| 4379551 | Ahrens | Apr 1983 | |
| 4487411 | Ahrens | Dec 1984 |
| Entry |
|---|
| GameTime, Inc., "Park & Playground 1995", (1994), pp. 90, 91, 92 and 93. |