Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889644 | Machine washing process: detergent paste and automatic dispenser | Guenther Amberg, Wolfgang Bechstedt, Paul Schulz | 1989-12-26 |
| 4832863 | Low-foam phosphate-free detergent | Helmut Grund | 1989-05-23 |