Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4469213 | Coin detector system | Donald O. Parker | 1984-09-04 |
| 4437558 | Coin detector apparatus | Donald O. Parker | 1984-03-20 |
| 4327824 | Cheat preventing device for coin machines | — | 1982-05-04 |