Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9275793 | Current input converter | Yusuke Yanagihashi, Hiroyuki Shirakawa, Toshio Tanaka, Hiroyuki Maehara, Noriyoshi Suga | 2016-03-01 |
| 8861163 | Protection relay | Hiroyuki Shirakawa, Yusuke Yanagihashi, Hiroyuki Maehara, Toshio Tanaka, Noriyoshi Suga | 2014-10-14 |
| 8218278 | Current differential relay device, signal processing method thereof and power transmission line protection system | Masamichi Saga, Mitsuaki Mizunoue | 2012-07-10 |
| 7199989 | Digital protection relay with time sync function | Daiju Itagaki, Hiroaki Ayakawa | 2007-04-03 |
| 6847691 | Time synchronizing system | Hideki Torikoshi, Shigekazu Morita, Koichi Hamamatsu | 2005-01-25 |
| 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 |
| 6459960 | Distance relay equipment | Yasuhiro Kurosawa, Hidenori Amou | 2002-10-01 |