Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4302463 | 1-Azaxanthone-3-carboxylic acids and their production | Toshihiro Ishiguro, Akira Nohara | 1981-11-24 |
| 4299963 | 1-Azaxanthone derivatives | Akira Nohara, Hirosada Sugihara | 1981-11-10 |
| 4267332 | 3-(Tetrazol-5-yl)-1-azaxanthones | Akira Nohara, Toshihiro Ishiguro | 1981-05-12 |
| 4255576 | 1-Azaxanthone derivatives | Akira Nohara, Hirosada Sugihara | 1981-03-10 |