Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4919680 | High-extraction chrome tanning process | Bernhard Wehling, Bernd Makowka, Heinz Klein, Gertrud A. Klein | 1990-04-24 |
| 4834763 | Process for the retanning of chrome leathers | Bernhard Wehling, Josef Muller | 1989-05-30 |