Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11111388 | Precipitated calcium carbonate with improved resistance to structural breakdown | Holger Spiegel, Wolfgang Kreuger, Mathieu Skrzypczak, Joe Wenk, Aaro Salonen +3 more | 2021-09-07 |
| 10676620 | Precipitated calcium carbonate with improved resistance to structural breakdown | Holger Spiegel, Wolfgang Kreuger, Mathieu Skrzypczak, Joe Wenk, Aaro Salonen +3 more | 2020-06-09 |
| 7661231 | Concrete building system and method | — | 2010-02-16 |
| 7147197 | Concrete home building | — | 2006-12-12 |
| D280704 | Pencil cleaning disc and abrasive sheet package | — | 1985-09-24 |