Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863629 | Cleaning preparations for hard surfaces | Rainer Osberghaus, Birgit Froehlich | 1989-09-05 |
| 4810291 | Floor care preparation | Rainer Osberghaus, Gian D. Ameglio, Harald Bossek | 1989-03-07 |