Top Inventors at Envirotest Systems Holdings All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Donald H. Stedman | 8 |
| 2 | John DiDomenico | 7 |
| 3 | James H. Johnson | 5 |
| #4 | Michael D. Jack | 5 |
| #5 | David R. Nelson | 4 |
| #6 | Jay Peterson | 4 |
| #7 | Bruce R. Kohn | 3 |
| #8 | Craig S. Rendahl | 3 |
| #9 | Thomas J. Fournier | 3 |
| #10 | Troy P. Bahan | 3 |
| #11 | Dennis L. Smith | 2 |
| #12 | George Charles Polchin | 2 |
| #13 | Peter M. McClintock | 2 |
| #14 | Robert A. Gentala | 2 |
| #15 | Donald J. Avery | 1 |
| #16 | Donald W. Bilsbarrow | 1 |
| #17 | Gary Bishop | 1 |
| #18 | Glenn E. Mitchell | 1 |
| #19 | Jeffrey L. Hanson | 1 |
| #20 | John Di Domenico | 1 |
| #21 | John Kert | 1 |
| #22 | Kenneth W. Michaels | 1 |
| #23 | Kerri R. Shotwell | 1 |
| #24 | Mark Frost | 1 |
| #25 | Mary Virginia SMITH | 1 |
| #26 | Michael N. Gray | 1 |
| #27 | Pradeep R. Tripathi | 1 |
| #28 | Rodney T. Boorse | 1 |
| #29 | Robert D. Stephens | 1 |
| #30 | Samuel Lee | 1 |
| #31 | Terry Edward Goretti | 1 |
| #32 | W. John Williams | 1 |
| #33 | Allen J. Paneral | 1 |