Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693823 | Process for preparing 1,1-disubstituted-1H-benzoe!indole compound and hydroxyl-substituted compound thereof | Katsuyoshi Yamakawa | 1997-12-02 |
| 5672714 | Method of manufacturing a 3-substituted-3-oxo-2-halopropionic acid amide compound and method of manufacturing a 3-substituted-3-oxo-2-(5,5-dimethylhydantoin-3-yl) propionic acid amide compound | Katsuyoshi Yamakawa | 1997-09-30 |