Showing 1–22 of 22 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Charles W. Heady | Powerbrace | 8 |
| 2 | Craig Hastings | Pioneer (Corteva) | 7 |
| 3 | Mark A. Terpstra | — | 3 |
| #4 | Jeff Huitt | Summers Manufacturing Company | 2 |
| #4 | Don Van Houweling | — | 2 |
| #4 | Nick Weber | Summers Manufacturing Company | 2 |
| #4 | William Caswell | — | 2 |
| #8 | Nancy R. Kiefer | — | 1 |
| #8 | W. Joe Jacobsen | Unknown | 1 |
| #8 | Brad R. Kiefer | — | 1 |
| #8 | Lawrence Donahue | — | 1 |
| #8 | Matt Gilmore | — | 1 |
| #8 | Patrick D. Gashe | Sentry Valve Company | 1 |
| #8 | David Matthew Harland | Unknown | 1 |
| #8 | Aaron J. Menz | John Deere | 1 |
| #8 | Ronald R. Heck | — | 1 |
| #8 | Patrick D. Gasche | Sentry Valve Company | 1 |
| #8 | Criag Hastings | Pioneer (Corteva) | 1 |
| #8 | Scott A. Farley | — | 1 |
| #8 | William A. Secress | Osmundson Mfg. | 1 |
| #8 | Marlin Eineke | Unknown | 1 |
| #8 | Rodney A. Pentico | Asgrow Seed Company | 1 |
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