Showing 1–6 of 6 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Joshua Lee Malmassari | Federal Signal | 5 |
| 2 | Ellworth R. Danz | General Time | 3 |
| 2 | Timothy P. Manthei | Sage Products | 3 |
| #4 | Donald J. Friddle | Outboard Marine | 1 |
| #4 | Raymond M. Anderes | — | 1 |
| #4 | Cole Little | — | 1 |
Part of Illinois