Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5500118 | Biogas reactor for the anaerobic treatment of waste water | Hubert Coenen, Michael Zumbragel | 1996-03-19 |
| 5190672 | Method for thermal disposal of sewage sludge | Hubert Coenen, Friedhelm Bultmann, Matthias Brunner | 1993-03-02 |