Top Inventors at Oldcastle Infrastructure All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Tom Happel | 6 |
| 2 | James Ferguson Holtz | 3 |
| 3 | Christopher Ryan Demarest | 2 |
| #4 | Nguyen Thai Dang | 2 |
| #5 | Thomas H. Happel | 2 |
| #6 | Chris Ryan Demarest | 1 |
| #7 | Craig Knochenmus | 1 |
| #8 | David L. Morris | 1 |
| #9 | F. Matthew Schweinberg | 1 |
| #10 | Jacob Nohl | 1 |
| #11 | Jeff S. Zager | 1 |
| #12 | Johnny M. Bishop | 1 |
| #13 | Mike Collins | 1 |
| #14 | Robert E. Hughes | 1 |
| #15 | Ross Jette | 1 |
| #16 | Alec Gausman | 1 |