| Number | Name | Date | Kind |
|---|---|---|---|
| 3606333 | Green | Sep 1971 | |
| 4082283 | La Ferla et al. | Apr 1978 | |
| 4184685 | Wilson | Jan 1980 | |
| 5037110 | Haskel | Aug 1991 | |
| 5524898 | Pavlovic | Jun 1996 | |
| 5547199 | Calhoun | Aug 1996 | |
| 5679002 | Scelzo | Oct 1997 |
| Entry |
|---|
| Reader#s Digest-Book of 1000 Family Games, 1971. |