Showing 1–7 of 7 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Philip Stone | Ethan Allen | 2 |
| 2 | Robert Kooy | Bee Chemical | 1 |
| 2 | Edward A. Bell | Stanrail | 1 |
| 2 | Richard E. Jamrozy | Thrall Car Manufacturing | 1 |
| 2 | Gilbert J. Evers | C. Cretors & | 1 |
| 2 | Warren P. Dickinson | — | 1 |
| 2 | Walter J. Mamak | Andrew | 1 |
Part of Illinois