Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4941887 | Quinophtahalone derivatives for dyeing denim cotton yarn, optionally with indigo dyes to give yellow, green or black shades | Tetsuo Sakagawa, Takayuki Nakayama, Hisanobu Kunihiro, deceased | 1990-07-17 |