Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6653454 | Formazane compounds and method of dyeing using the same | Mariko Umeda, Yasuo Shirasaki, Eiichi Ogawa | 2003-11-25 |
| 4273555 | Azo compounds | Yasushi Yamada, Hiroshi Ozawa, Masae Gomi | 1981-06-16 |