Showing 1–5 of 5 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | John W. Spirk | Nottingham Spirk Design Associates | 3 |
| 2 | Hugh T. Greenlee | Fox Valley Instrument | 2 |
| 3 | Ridley Watts, Jr. | Nordson | 1 |
| 3 | William W. Rader | Unknown | 1 |
| 3 | Robert J. deFasselle | Unknown | 1 |
Part of Ohio