Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5686011 | Process for waterproofing materials having a fibrous structure and agents used to carry out this process | Helmut Lohmann, Leonardus Strijbos, Waldemar Inger | 1997-11-11 |