Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834763 | Process for the retanning of chrome leathers | Bernhard Wehling, Helga Rosentreter | 1989-05-30 |
| 4211529 | Chrome-tanning | Heinrich Spahrkas, Ernst Komarek, Wolfhard Luck | 1980-07-08 |