Top Inventors at Gradco Systems All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Frederick J. Lawrence | 5 |
| 2 | R. Clark DuBois | 3 |
| 3 | Peter M. Coombs | 2 |
| #4 | Hans Graafmans | 1 |
| #5 | John C. Hamma | 1 |
| #6 | Klaus Thogersen | 1 |
| #7 | George M. Cron | 1 |
| Rank | Name | Patents |
|---|---|---|
| 1 | Frederick J. Lawrence | 5 |
| 2 | R. Clark DuBois | 3 |
| 3 | Peter M. Coombs | 2 |
| #4 | Hans Graafmans | 1 |
| #5 | John C. Hamma | 1 |
| #6 | Klaus Thogersen | 1 |
| #7 | George M. Cron | 1 |