Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839098 | Liquid detergent | Klaus-Dieter Wisotzki, Peter Jeschke, Klaus Schumann, Karl Schmid, Manfred Biermann | 1989-06-13 |
| 4797231 | Multipurpose cleaning preparations for hard surfaces | Klaus Schumann, Paul Schulz, Franz Foerg | 1989-01-10 |