Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5417723 | Use of ester urethanes for retanning | Harro Traubel, Joachim Kochta | 1995-05-23 |
| 5352241 | Process for retanning mineral tanned leathers with aromatic sulphonic acids | Franz Schade, Bernhard Wehling, Henricus Slaats | 1994-10-04 |