Showing 1–5 of 5 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Benjamin R. Manthei | Redi-Rock International | 2 |
| 2 | Steven J LaBlance | — | 1 |
| 2 | James A. Manthci | Redi-Rock International | 1 |
| 2 | Brian Osterberg | — | 1 |
| 2 | Jon L. Coveyou | Jervis B. Webb | 1 |
Part of Michigan