| Number | Name | Date | Kind |
|---|---|---|---|
| 3610626 | Nolte | Oct 1971 | |
| 3767201 | Harper et al. | Oct 1973 |
| Number | Date | Country |
|---|---|---|
| 2838140 | Mar 1980 | DEX |
| 1283840 | Feb 1972 | GBX |
| Entry |
|---|
| "3-Dimensional Space Chess" House Beautiful advertisement, Nov. 1967, p. 214. |
| "Space Chess" Sears advertisement. |
| "The $100,000 Gambit:Making Chess a Play Object by Frank Brady", Games Magazine, Jan.-Feb. 1981, pp. 18-20. |
| "Three-Dimensional Chess" Chess Variations by John Gollon, pp. 228-229. |