Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824663 | Biocidal macroemulsions containing polyvinyl alcohol | Heinz J. Niessen, John Goossens, Hans Schulze | 1989-04-25 |
| 4814167 | Pyrettroid macroemulsions containing polyvinyl alcohol | Heinz J. Niessen, Bernd Klinksiek | 1989-03-21 |