Showing 1–4 of 4 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | James E. Barker | Federal Signal | 2 |
| 2 | Merrill L. Grile | — | 1 |
| 2 | Tracy Don Witham | Unknown | 1 |
| 2 | Charles M. Clour | — | 1 |
Part of Minnesota
5 patents · 4 inventors · 0.5/1k pop.
Ranked #9,054 of 30,370 cities Top 30%
Showing 1–4 of 4 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | James E. Barker | Federal Signal | 2 |
| 2 | Merrill L. Grile | — | 1 |
| 2 | Tracy Don Witham | Unknown | 1 |
| 2 | Charles M. Clour | — | 1 |
Part of Minnesota