Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834763 | Process for the retanning of chrome leathers | Bernhard Wehling, Helga Rosentreter | 1989-05-30 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834763 | Process for the retanning of chrome leathers | Bernhard Wehling, Helga Rosentreter | 1989-05-30 |