Showing 1–7 of 7 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | David W. Kirby | — | 4 |
| 1 | Thomas J. Hamilton | Jackson Products | 4 |
| 3 | Steven E. Zibell | Wm. Wrigley Jr. | 2 |
| #4 | Marilyn L. McGreal | — | 1 |
| #4 | James Schultz | Am Manufacturing | 1 |
| #4 | Mary Ellen Bulow | Northwestern University | 1 |
| #4 | William Rediehs | — | 1 |
Part of Illinois