| Number | Name | Date | Kind |
|---|---|---|---|
| 3592473 | Jernakoff et al. | Jul 1971 | |
| 3659853 | Church | May 1972 | |
| 4034988 | Goldner et al. | Jul 1977 | |
| 4223893 | Shane et al. | Sep 1980 | |
| 4244578 | Rosenzweig | Jan 1981 | |
| 4314336 | Bernstein et al. | Feb 1982 |
| Number | Date | Country |
|---|---|---|
| 2709938 | Sep 1978 | DEX |
| Entry |
|---|
| I. J. Dilworth, "Electronic Die", Jan. 1978, Practical Electronics, pp. 340-344. |
| "Take a Gamble: Double Die", May 1979, Electronics Today International, pp. 26-29. |
| Don Lancaster, "Spots Before Your Eyes", 9/77, Popular Electronics, pp. 29-34. |