Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7430834 | Membrane-covered reservoir having a hatchway therein | — | 2008-10-07 |
| 7309431 | Method for breaking a flap-valve attachment condition under a membrane cover | — | 2007-12-18 |
| 6612079 | Clarifier cover | Brent M. Howe, Brian MacLean | 2003-09-02 |
| 6497533 | Drainage system with membrane cover and method for covering wastewater reservoir | — | 2002-12-24 |
| 6389757 | Clarifier cover | — | 2002-05-21 |
| 6357964 | Drainage system with membrane cover and method for covering wastewater reservoir | — | 2002-03-19 |
| 6338169 | Floating cover for large liquid reservoir | — | 2002-01-15 |
| 6324792 | Circular clarifier with retractable cover | — | 2001-12-04 |