Top Inventors at Pittsburgh-Des Moines All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | John O. Cliff | 6 |
| 2 | James M. Edwards | 4 |
| 3 | Richard E. Hills | 4 |
| #4 | George Cochran Harper | 2 |
| #5 | Harold F. Honath | 2 |
| #6 | John C. Murphy | 2 |
| #7 | Robert H. Swinderman | 2 |
| #8 | Clarence H. Myers | 1 |
| #9 | John Terlesky | 1 |
| #10 | Richard A. Vater | 1 |
| #11 | Thomas Tague | 1 |
| #12 | Ulhas S. Patil | 1 |
| #13 | J. Keith Carlat | 1 |
| #14 | Gebhart J. Reiling | 1 |