Top Inventors at Granco Clark All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Charles B. Gentry | 7 |
| 2 | James T. Visser | 6 |
| 3 | David Rolston Jenista | 3 |
| #4 | John C. Bugai | 3 |
| #5 | Robert M. Scanlon | 3 |
| #6 | Scott David Buiten | 3 |
| #7 | Derek William Boden | 2 |
| #8 | David R. Dietz | 1 |
| #9 | Gregory Berrevoets | 1 |
| #10 | Jeffrey Allen Ferman | 1 |
| #11 | Todd Buiten | 1 |
| #12 | Jeffrey D. Brach | 1 |
| #13 | Thomas W. Uganski | 1 |