Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9963830 | Method for producing a mat of cellulose fibres with a controlled level of mineral material for bitumen-impregnated roofing elements, and suitable device | Waldemar Wiktorski | 2018-05-08 |