| Number | Name | Date | Kind |
|---|---|---|---|
| 3284083 | Levin et al. | Nov 1966 | |
| 3747936 | Ohki | Jul 1973 | |
| 3759525 | Davis | Sep 1973 | |
| 3770269 | Elder | Nov 1973 | |
| 3808705 | Schmoyer | May 1974 | |
| 3819186 | Hinterstocker | Jun 1974 | |
| 3834710 | Sousan | Sep 1974 |
| Entry |
|---|
| Radio Electronics; "Electronic Casino;" Part I; Mar. 1974; pp. 45, 50-52, 86. |
| Radio Electronics; "Electronic Casino;" Part II; Apr. 1974; pp. 58, 59. |