Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885115 | Liquid electrolyte for use in electrolytic capacitor | Yutaka Yokoyama | 1989-12-05 |
| 4830785 | Electrolyte for electrolytic capacitor | Tatsunori Tsuji, Yutaka Yokoyama | 1989-05-16 |
| 4810400 | Electrolyte for electrolytic capacitor | Yutaka Yokoyama | 1989-03-07 |