Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D386241 | Outlet filter for waste water treatment tank | — | 1997-11-11 |
| 5683577 | Filter device for wastewater treatment system | — | 1997-11-04 |
| 5593584 | Septic tank filter | — | 1997-01-14 |
| 5591331 | Filter device including a housing with removable sidewalls having a filtering capacity | — | 1997-01-07 |