Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5098900 | 3(2H)pyridazinone, process for its preparation and anti-allergic agent containing it | Keizo Tanikawa, Ken-ichi Shikada, Ryozo Sakoda | 1992-03-24 |
| 4892947 | 3(2H)Pyridazinone, process for its preparation and anti-allergic agent containing it | Keizo Tanikawa, Ken-ichi Shikada, Ryozo Sakoda | 1990-01-09 |
| 4783462 | 3(2H)pyridazinone, and anti-allergic agent containing it | Keizo Tanikawa, Ken-ichi Shikada, Ryozo Sakoda | 1988-11-08 |
| 4412082 | Method for preparing 4-hydroxyphenylacetic acid | Shin-ichi Yamada | 1983-10-25 |