Showing 1–4 of 4 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Thomas S. Riccobene | Keystone Retaining Wall Systems | 11 |
| 2 | Jerry H. Nelson | — | 1 |
| 2 | Brian R. Holt | Target Brands | 1 |
| 2 | J. Martin Carlson | Tamarack Habilitation Technologies | 1 |
Part of Minnesota