Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863523 | Process for cleaning soiled solid molded articles | Alfred Meffert, Andreas Syldatk | 1989-09-05 |
| 4830784 | Laundry detergents and cleaners with reduced requirement for conventional chemicals | Alfred Meffert, Brigitte Glesen, Andreas Syldatk, Ingo Wegener | 1989-05-16 |