Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8155796 | Protective relay device | — | 2012-04-10 |
| 4661877 | Transformer protective relay | — | 1987-04-28 |
| 4530025 | Current ratio-differential relay | — | 1985-07-16 |
| 4513344 | Protective relay for power system | — | 1985-04-23 |
| 4502013 | Input converting circuit | — | 1985-02-26 |
| 4477854 | Portective relay with second harmonic suppression | Akiyoshi Honma | 1984-10-16 |