Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883988 | Current mirror switching circuit | Akira Ide | 1989-11-28 |
| 4853378 | Fluorine derivatives of vitamin D.sub.3 and process for producing the same | Noritaka Hamma, Toshio Nishizawa, Takashi Katsumata | 1989-08-01 |