Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5340485 | Apparatus and method for clarifier sludge collection | Steven G. Coombs | 1994-08-23 |
| 5219470 | Apparatus and method for clarifier sludge collection | Steven G. Coombs | 1993-06-15 |
| 4624783 | Apparatus for granular media filter | Brent C. Black, Ralph B. Haymore | 1986-11-25 |
| 4450077 | Granular media filter | Brent C. Black, Ralph B. Haymore | 1984-05-22 |