Showing 1–4 of 4 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | David Simpson | Advanced Technology Laboratories | 1 |
| 1 | John W. Van Horn | Duncan Industries Parking Control Systems | 1 |
| 1 | Daniel R. Cloutier | Sunnen Products | 1 |
| 1 | Richard A. Sunderland | Sherwood Medical | 1 |
Part of Iowa