Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822823 | Aqueous preparation and method of preparation thereof | Yujiro Yamamoto, Yasushi Morita | 1989-04-18 |
| 4820837 | 1-hydroxy-oxo-5H-pyrido(3,2-a)phenoxazine-3-carboxylic acid esters | Jun Inoue | 1989-04-11 |