Showing 1–6 of 6 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Thomas S. Riccobene | Keystone Retaining Wall Systems | 7 |
| 2 | Dominic T. Riccobene | Riccobene Designs | 5 |
| 3 | Paul A. Olson | Oldenburg Group Incorporated | 2 |
| #4 | Donald W. Olson | — | 1 |
| #4 | Brian Koski | Wex Companies | 1 |
| #4 | Jim Strandlund | — | 1 |
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