Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7838669 | Naphthalocyanine dye and method for producing the same | Katsuyoshi Yamakawa | 2010-11-23 |
| 7655814 | Process for producing croconic acid or salt thereof | Katsuyoshi Yamakawa | 2010-02-02 |