Top Inventors at Water Pollution Control All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Lloyd Ewing | 8 |
| 2 | David T. Redmon | 7 |
| 3 | William H. Roche | 4 |
| #4 | Frank L. Schmit | 3 |
| #5 | Paul M. Thayer | 3 |
| #6 | William W. Winkler | 3 |
| #7 | Frank Schmidt | 1 |
| #8 | Michael J. Bykowski | 1 |
| Rank | Name | Patents |
|---|---|---|
| 1 | Lloyd Ewing | 8 |
| 2 | David T. Redmon | 7 |
| 3 | William H. Roche | 4 |
| #4 | Frank L. Schmit | 3 |
| #5 | Paul M. Thayer | 3 |
| #6 | William W. Winkler | 3 |
| #7 | Frank Schmidt | 1 |
| #8 | Michael J. Bykowski | 1 |