Top Inventors at Coin Mechanisms All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Joe Ferrantelli | 3 |
| 2 | Kirk D. Hoffman | 3 |
| 3 | Robert Huizenger | 3 |
| #4 | Donald O. Parker | 1 |
| #5 | Edward H. Bell | 1 |
| #6 | Raymond Nicholson | 1 |
| #7 | Robert N. Rollins | 1 |
| Rank | Name | Patents |
|---|---|---|
| 1 | Joe Ferrantelli | 3 |
| 2 | Kirk D. Hoffman | 3 |
| 3 | Robert Huizenger | 3 |
| #4 | Donald O. Parker | 1 |
| #5 | Edward H. Bell | 1 |
| #6 | Raymond Nicholson | 1 |
| #7 | Robert N. Rollins | 1 |