Showing 1–5 of 5 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | John W. Spirk | Nottingham Spirk Design Associates | 5 |
| 2 | Don W. Cochran | Pressco Technology | 2 |
| 3 | Robert Mark Fumich | — | 1 |
| 3 | David A. Elmes | British Petroleum | 1 |
| 3 | James D. Burrington | The Lubrizol | 1 |
Part of Ohio