Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851525 | Conversion of organophosphonic acids into their salts using intense shear | Willi Wuest, Hubert Harth, Dirk Springer | 1989-07-25 |
| 4797231 | Multipurpose cleaning preparations for hard surfaces | Klaus Schumann, Ortburg Guirr, Paul Schulz | 1989-01-10 |