Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5626664 | Waste treatment process | G unter Ritter, G unter Treutlein, Manfred Erken | 1997-05-06 |
| 5607505 | Waste treatment process | G unter Ritter, G unter Treutlein, Manfred Erken | 1997-03-04 |