Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881018 | Manually assistable electric driving device | Yoji Kato, Osamu Minai, Hirosi Tukamoto, Katsuji Kosaka | 1989-11-14 |
| 4838552 | Multiline slot machine | — | 1989-06-13 |
| 4805907 | Slot machine | — | 1989-02-21 |