Top Inventors at Spirogen Limited All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Philip Wilson Howard | 17 |
| 2 | David Edwin Thurston | 11 |
| 3 | Stephen John Gregson | 4 |
| #4 | B. Rao Vishnuvajjala | 3 |
| #5 | Kenneth M. Snader | 3 |
| #6 | Paul S. Liu | 3 |
| #7 | David E. Thurston | 2 |
| #8 | Gregory Turner | 2 |
| #9 | Luke Y. Hsiao | 2 |
| #10 | Gyoung-Dong Kang | 1 |
| #11 | Luke Masterson | 1 |
| #12 | Peter William Taylor | 1 |
| #13 | Tsveta Stefanova Hadjivassileva | 1 |
| #14 | Zhizhi Chen | 1 |