Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7296693 | Anaerobic sludge digester | Maunoir Siegfried | 2007-11-20 |
| 6319873 | Biological activator for a septic tank | — | 2001-11-20 |
| 5019265 | Process for activating the operation of a system for anaerobic digestion of solid organic residues | — | 1991-05-28 |
| 4886605 | All-purpose septic tank | — | 1989-12-12 |