Top Inventors at Safety Kleen All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Douglas A. Larson | 7 |
| 2 | John P. Kusz | 6 |
| 3 | Thomas J. Danowski | 6 |
| #4 | Frank A. Osmanski | 3 |
| #5 | John C. Justice | 3 |
| #6 | Esfandiar Kiany | 2 |
| #7 | John A. Dingess | 2 |
| #8 | Karl G. Otzen | 2 |
| #9 | Michael R. Dvorak | 2 |
| #10 | Roy N. Voss | 2 |
| #11 | William L. Jacoby, Jr. | 2 |
| #12 | Boris Goltsin | 1 |
| #13 | Gilbert Gavlin | 1 |
| #14 | Merrill E. Bishop | 1 |
| #15 | Michael R. Llewellyn | 1 |
| #16 | Nick Iliadis | 1 |
| #17 | René G. Laude | 1 |
| #18 | Stephen Holden | 1 |
| #19 | Theodore H. Hueller | 1 |
| #20 | William M. Langdon, deceased | 1 |
| #21 | Alan Gendreau | 1 |
| #22 | Donald Racquet | 1 |
| #23 | Oskar Franz | 1 |
| #24 | Gustavo Cuveas | 1 |
| #25 | Gunther Erlebacher | 1 |