Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841027 | Process for preparing phenyl- and naphthylazo-aminonaphthol sulphonic acids | Yutaka Kayane, Takashi Omura, Yasuo Tezuka | 1989-06-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841027 | Process for preparing phenyl- and naphthylazo-aminonaphthol sulphonic acids | Yutaka Kayane, Takashi Omura, Yasuo Tezuka | 1989-06-20 |