Showing 1–7 of 7 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Michael A. Spohn | Bayer Healthcare | 116 |
| 2 | Ronald Barrett | North American Refractories | 14 |
| 3 | Richard Spryn | Agr International | 2 |
| #4 | Ernest Charles Rodgers | — | 1 |
| #4 | Todd Eric Waldroup | Penn United Technologies | 1 |
| #4 | Frank D. Gross | — | 1 |
| #4 | Richard Eugene Ehrman | — | 1 |
Part of Pennsylvania