Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5472741 | Softening and waterproofing retanning agents | Gunter Sackmann, Bruno Bomer, Joachim Kochta | 1995-12-05 |
| 5352241 | Process for retanning mineral tanned leathers with aromatic sulphonic acids | Franz Schade, Wilhelm Krummel, Bernhard Wehling | 1994-10-04 |