| Number | Date | Country | Kind |
|---|---|---|---|
| 8431070 | Dec 1984 | GBX |
| Number | Name | Date | Kind |
|---|---|---|---|
| 4184683 | Hooker | Jan 1980 | |
| 4200291 | Hooker | Apr 1980 |
| Number | Date | Country |
|---|---|---|
| 581358 | Oct 1976 | CHX |
| 619372 | Sep 1980 | CHX |
| 1359852 | Jul 1974 | GBX |
| 1553117 | Sep 1979 | GBX |
| 1568522 | May 1980 | GBX |
| 1591623 | Jun 1981 | GBX |
| 2137392 | Mar 1984 | GBX |
| Entry |
|---|
| PCT Application WO80/02512, Krause, "Computerized Gaming System", 10/4/80. |