Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6731655 | Current differential relay device | Hajime Kurihara | 2004-05-04 |
| 6714148 | Digital protective relay | Masamichi Saga | 2004-03-30 |
| 6678134 | Digital protective relay system | Hideaki Sugiura, Hachidai Ito, Masamichi Saga | 2004-01-13 |