| Number | Name | Date | Kind |
|---|---|---|---|
| 4051607 | Sullivan | Oct 1977 | |
| 4170080 | Bergh | Oct 1979 | |
| 4258920 | Waldron et al. | Mar 1981 | |
| 4976055 | Kane | Dec 1990 |
| Number | Date | Country |
|---|---|---|
| 2418661 | Nov 1979 | FRX |
| 2642320 | Aug 1990 | FRX |
| 2135201 | Aug 1984 | GBX |
| Entry |
|---|
| "Playthings", Puzzle-Up magnetic jigsaw puzzle, Dec., 1973, p. 54. |