Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667534 | Dye mixtures comprising 1:2 chromium complex dyes, and 1:2 chromium complex dyes | Urs Lehmann | 1997-09-16 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667534 | Dye mixtures comprising 1:2 chromium complex dyes, and 1:2 chromium complex dyes | Urs Lehmann | 1997-09-16 |