Showing 1–21 of 21 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Joshua W. Steffen | Caterpillar | 31 |
| 2 | Lee Marvin John Assam | State Farm | 25 |
| 3 | Richard R. Bergquist | Optimum Quality Grains, L.L.C. | 14 |
| #4 | Nathan Barnard | State Farm | 9 |
| #4 | James Young | Norco Industries | 9 |
| #6 | Eric L. Rogers | Caterpillar | 5 |
| #7 | Glenn Purcell | Bayer Healthcare | 4 |
| #8 | Mark Henneberry | Vertec Biosolvents | 3 |
| #8 | Robert A. Prochnow | Solar Turbines Incorporated | 3 |
| #8 | Jose Paul Francois Moretto | — | 3 |
| #11 | Daniel W. Steffen | — | 2 |
| #11 | Timothy J. Matzke | Caterpillar | 2 |
| #13 | Marvin Roisland | State Farm | 1 |
| #13 | Josh Steffen | Caterpillar | 1 |
| #13 | Michele R. Ludwig | Caterpillar | 1 |
| #13 | Jonathan Hostetler | — | 1 |
| #13 | Robert O. Schertz | — | 1 |
| #13 | Christian S. Porzelius | — | 1 |
| #13 | Steve Skrzypczynski | State Farm | 1 |
| #13 | Kurt Jackson | Caterpillar | 1 |
| #13 | Stephen T. Konwinski | Caterpillar | 1 |
Part of Illinois