Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5364542 | Fabric softener rinsing agents | Horst Birkhan, Joachim Welgand, Winfried Wehner | 1994-11-15 |
| 5180508 | Fabric softener rinsing agents | Horst Birkhan, Joachim Weigand, Winfried Wehner | 1993-01-19 |