Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4811158 | Solid state charger | Yasuyuki Kani, Seiichi Miyakawa | 1989-03-07 |
| 4803593 | Flat solid discharging device | Kazuyoshi Matsumoto, Seiichi Miyakawa, Shigeru Suzuki | 1989-02-07 |