Showing 1–12 of 12 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | David L. Barker | Musco | 3 |
| 1 | Joshua D. Graeve | John Deere | 3 |
| 3 | Henry D. Anstey | John Deere | 2 |
| 3 | Benjamin M. Lovett | John Deere | 2 |
| #5 | John Bohlmann | Cargill, Incorporated | 1 |
| #5 | James C. Walters | John Deere | 1 |
| #5 | Carl F. Demulder | John Deere | 1 |
| #5 | Francine J. Perry | John Deere | 1 |
| #5 | Darrin L. Guler | Musco | 1 |
| #5 | Brenda L. Ray | Cargill, Incorporated | 1 |
| #5 | Todd Aeschliman | John Deere | 1 |
| #5 | Daniel E. Derscheid | John Deere | 1 |
Part of Iowa