Top Inventors at Span Instruments All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Tommy L. Gray | 11 |
| 2 | Henry J. McCarrick | 5 |
| 3 | Kevin Cochrane Ross | 4 |
| #4 | Douglas N. Laube | 2 |
| #5 | Joseph W. Adamic, Jr. | 1 |
| #6 | John F. Jordon, III | 1 |
| #7 | Khanh Tran | 1 |
| #8 | William T. Leyden, III | 1 |
| #9 | Bruce Paynter | 1 |