Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4507125 | Use of 1:2 chrome complex dyes for dyeing leather and furs | Josef Koller | 1985-03-26 |
| 4507124 | 1:2 Metal complexes of azomethine dyes having arylazo groups | Fabio Beffa | 1985-03-26 |
| 4486196 | Chrome-complex dyes and the production and use thereof for dyeing wool, polyamide | — | 1984-12-04 |
| 4453942 | Use of 1:2 cobalt complex dyes for dyeing leather or furs | — | 1984-06-12 |
| 4452602 | Process for dyeing leather with mixtures of dyes | Josef Koller, Fabio Beffa | 1984-06-05 |
| 4443370 | Chrome-complex dyes | — | 1984-04-17 |
| 4427411 | Use of 1:2 chromium or cobalt complex dyes for dyeing leather or furs | — | 1984-01-24 |
| 4425133 | Use of 1:2 chromium of cobalt complex dyes for dyeing leather or furs | — | 1984-01-10 |
| 4315854 | Chromium and cobalt complex amino hydroxy azomethine dyes | Fabio Beffa | 1982-02-16 |