Top Inventors at Esi All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | David R. Hardten | 4 |
| 2 | Thomas A. Burba | 4 |
| 3 | Thomas C. Prager | 4 |
| #4 | William T. Ryder | 2 |
| #5 | Glenn Dickson | 1 |
| #6 | Mal Urban | 1 |
| #7 | Timothy Addy | 1 |
| #8 | Warner E. Speakman | 1 |
| Rank | Name | Patents |
|---|---|---|
| 1 | David R. Hardten | 4 |
| 2 | Thomas A. Burba | 4 |
| 3 | Thomas C. Prager | 4 |
| #4 | William T. Ryder | 2 |
| #5 | Glenn Dickson | 1 |
| #6 | Mal Urban | 1 |
| #7 | Timothy Addy | 1 |
| #8 | Warner E. Speakman | 1 |