Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6306303 | Washing process with waste water recycling | Walter Guhl, Hans-Josef Wieser | 2001-10-23 |
| 4977294 | Quaternary ammonium phosphates based on amino-functional polyesters | Guenter Uphues, Uwe Ploog, Wolfgang Becker | 1990-12-11 |