Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857070 | 2,4-Diaminophenyl tetrahydrofurfuryl ethers, processes for their preparation and tinting compositions, which contain them for keratinic fibres | Horst Tappe | 1989-08-15 |