Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5078869 | Clarifier cleaning apparatus | David DiGregorio | 1992-01-07 |
| 5078873 | Filter cleaning apparatus | Steven G. Coombs, John B. Ainsworth, John Thorum | 1992-01-07 |
| 4936982 | Intrachannel clarifier | David DiGregorio, Mark G. Biesinger | 1990-06-26 |
| 4624783 | Apparatus for granular media filter | Bruce D. Bradley, Ralph B. Haymore | 1986-11-25 |
| 4450077 | Granular media filter | Bruce D. Bradley, Ralph B. Haymore | 1984-05-22 |