Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846990 | Fabric-softening detergent | Winfried Wichelhaus | 1989-07-11 |
| 4839066 | Fabric-softening detergent | Wolfgang von Rybinski, Winfried Wichelhaus | 1989-06-13 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846990 | Fabric-softening detergent | Winfried Wichelhaus | 1989-07-11 |
| 4839066 | Fabric-softening detergent | Wolfgang von Rybinski, Winfried Wichelhaus | 1989-06-13 |