Showing 1–5 of 5 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Curt Graham | Fluor Technologies | 27 |
| 2 | Duane Harthoorn | Vermeer Manufacturing | 17 |
| 3 | Vernon Vandenhoek | — | 1 |
| 3 | Vernon M. Vanden Hoek | Unknown | 1 |
| 3 | John C. Estapa | — | 1 |
Part of Iowa
47 patents · 5 inventors · 123.7/1k pop.
Ranked #25,006 of 111,555 cities Top 25%
Showing 1–5 of 5 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Curt Graham | Fluor Technologies | 27 |
| 2 | Duane Harthoorn | Vermeer Manufacturing | 17 |
| 3 | Vernon Vandenhoek | — | 1 |
| 3 | Vernon M. Vanden Hoek | Unknown | 1 |
| 3 | John C. Estapa | — | 1 |
Part of Iowa