Number | Date | Country | Kind |
---|---|---|---|
1-106943 | Apr 1989 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
D272455 | Eakin | Jan 1984 | |
4221386 | Wisniewski | Sep 1980 | |
4391445 | Vizelyi | Jul 1983 |
Entry |
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"Games and Puzzles", Dec., 1976, p. 35, Puzzles shown in article titled Solid Gold. |