Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4927463 | Aqueous dispersion of gypsum and its use as a filler and coating pigment in the production of paper and cardboard | Erhard Kloetzer, Guenter Reinhard Schmidt | 1990-05-22 |