Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5002586 | Dyeing and printing of leather | Willi Egli | 1991-03-26 |
| 4834769 | Compositions for the dyeing of leather | Herbert Holliger | 1989-05-30 |
| 4717390 | Method for dyeing leather with water-soluble sulpho group-containing sulphur dyes | — | 1988-01-05 |