Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9275793 | Current input converter | Yusuke Yanagihashi, Hiroyuki Shirakawa, Toshio Tanaka, Hiroyuki Maehara, Itsuo Shuto | 2016-03-01 |
| 8861163 | Protection relay | Hiroyuki Shirakawa, Yusuke Yanagihashi, Hiroyuki Maehara, Toshio Tanaka, Itsuo Shuto | 2014-10-14 |
| 6954704 | Digital protection and control device | Yuuji Minami, Hiromi Nagasaki, Masayuki Kosakada | 2005-10-11 |
| 6845301 | System for protecting and controlling substation main circuit components | Koichi Hamamatsu, Tokuo Ito, Hachidai Ito, Yoshito Sameda, Toshiyuki Saida +9 more | 2005-01-18 |
| 4825326 | Digital calculation type differential relay | Fumio Andow | 1989-04-25 |
| 4507700 | Protective relaying system | Fumio Andow, Yuji Okita | 1985-03-26 |
| 4468796 | Frequency relay for use in the protection of electric power transmission lines | — | 1984-08-28 |