Top Inventors at Extel All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Edmund T. Marciniec | 2 |
| 2 | George Smejkal | 2 |
| 3 | Robert P. Adler | 2 |
| #4 | Daniel C. Wonak | 1 |
| #5 | Joseph F. Berg | 1 |
| #6 | Lawrence W. Markus | 1 |
| #7 | Melvin A. Lace | 1 |
| #8 | Patricio E. Donoso | 1 |
| #9 | Steven J. Butz | 1 |
| #10 | William A. Miller | 1 |
| #11 | Rudolf P. Chalupa | 1 |
| #12 | Prabhakar Pokala | 1 |