Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4357666 | Digital distance relays | Tetsuo Matsushima, Ryotaro Kondow | 1982-11-02 |
| 4328551 | Apparatus and method for protection of electric power transmission lines and the like | Mitsuru Yamaura, Ryotaro Kondow | 1982-05-04 |