Issued Patents 1997
Showing 1–2 of 2 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, Manfred Kaussen, Leonardus Strijbos | 1997-11-11 |
| 5658484 | Agents and a process for waterproofing leathers and furs | Helmut Lohmann, Wolfgang Hubner, Leonardus Strijbos | 1997-08-19 |