Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4542905 | Game with an electromagnetic ball detector | — | 1985-09-24 |
| 4443209 | Gaming apparatus having manually controllable-operating speed | Roman A. Tojza | 1984-04-17 |
| 4440036 | Gaming apparatus having manually controllable operating speed | Roman A. Tojza | 1984-04-03 |
| 4433844 | Drive mechanism for a variable speed gaming device | Roman A. Tojza | 1984-02-28 |
| 4430903 | Gaming apparatus having manually controllable operating speed | Roman A. Tojza | 1984-02-14 |
| 4431188 | Ball type game apparatus with laterally movable ball striking mechanism and control therefor | — | 1984-02-14 |
| 4427196 | Rotatable reel indexing having shock absorbing capability | Roman A. Tojza | 1984-01-24 |
| 4373727 | Variable speed gaming device | Roman A. Tojza | 1983-02-15 |
| 4257512 | Coin acceptor apparatus | — | 1981-03-24 |
| 4241920 | Amusement apparatus | — | 1980-12-30 |
| 4200291 | Device with hold and advance feature for the reels of a game machine | — | 1980-04-29 |
| 4184683 | Slot machine apparatus | — | 1980-01-22 |