Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6645563 | Method of coating a shaped mineral article | Cheng-Le Zhao, Bertold Bechert, Harm Wiese, Wolfgang Hümmer | 2003-11-11 |
| 6531179 | Use of aqueous polymer dispersions for modifying mineral coatings for concrete moldings | Bertold Bechert, Hans-Jurgen Denu, Eckehardt Wistuba | 2003-03-11 |