Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879509 | Zero-phase-sequence voltage sensing apparatus | Taro Sometani, Naotoshi Takaoka, Mitsuo Aida, Yasuhiro Tanahashi, Katsunori Aoki | 1989-11-07 |
| 4804922 | Voltage sensor | Taro Sometani, Naotoshi Takaoka, Mitsuo Aida, Yasuhiro Tanahashi, Katsunori Aoki | 1989-02-14 |