Number | Name | Date | Kind |
---|---|---|---|
3464701 | Mahoney | Sep 1969 | |
3884474 | Harper | May 1975 | |
4184685 | Wilson | Jan 1980 | |
4204685 | Jones | May 1980 | |
4883278 | Scott | Nov 1989 | |
5085440 | Van Daur | Feb 1992 |
Number | Date | Country |
---|---|---|
2550336 | May 1977 | DEX |
1283840 | Aug 1972 | GBX |
Entry |
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The Way to Play by the Diagram Group, Paddington Press Ltd. pp. 28-29, 1975. |
Spencer Gifts Catalog "Now! Play Chess In 3-D", Sep. 9, 1970. |