Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7339132 | Method of current interruption using puffer type gas circuit breaker with combined-action of cylinder and piston | Hajime Urai, Youichi Ohshita, Makoto Koizumi, Naoki Osawa, Hiroaki Hashimoto | 2008-03-04 |
| 6664494 | Current collector and gas circuit breaker | Makoto Hirose, Tomoyuki Andou | 2003-12-16 |
| 6624370 | Gas circuit breaker | Takuichiro Soga, Wataru Tamura, Hideo Kawamoto, Takeshi Iryo | 2003-09-23 |
| 6621030 | Gas-insulated switchgear | Tomoyuki Andou, Makoto Hirose, Osamu Koyanagi | 2003-09-16 |
| 6515247 | Gas insulated switchgear | Keiichi Tsuzura, Kazuhiko Takahashi, Minoru Yabuki | 2003-02-04 |
| 6399911 | Gas insulated switchgear apparatus | Keiichi Tsuzura, Kazuhiko Takahashi, Minoru Yabuki, Yasuhito Watanabe | 2002-06-04 |
| 6337452 | Gas insulated switchgear with flange-spacer assembly | Keiichi Tsuzura, Kazuhiko Takahashi, Minoru Yabuki | 2002-01-08 |
| 6278073 | Gas insulated switching apparatus | Keiichi Tsuzura, Kazuhiko Takahashi, Minoru Yabuki, Yasuhito Watanabe | 2001-08-21 |
| 6219225 | Gas insulated switch gear and method for assembling therefor | Keiichi Tsuzura, Kazuhiko Takahashi, Minoru Yabuki | 2001-04-17 |
| 6188034 | Gas insulated switchgear with flange-spacer assembly | Keiichi Tsuzura, Kazuhiko Takahashi, Minoru Yabuki | 2001-02-13 |
| 6067217 | Current limiter | Hiroshi Arita | 2000-05-23 |
| 5883774 | Current limiter | Hiroshi Arita | 1999-03-16 |
| 5825162 | Electric power flow controller | Hiroshi Arita, Shinichi Kondo | 1998-10-20 |
| 5726843 | Current limiting circuit breaker | Hiroshi Arita | 1998-03-10 |
| 5699219 | Ground fault current limiter and method of limiting ground fault current | Hiroshi Arita, Yoshiaki Matsui, Tokio Yamagiwa, Shigeyuki Sugimoto, Sadanori Neo | 1997-12-16 |
| 5467049 | Solid-state switch | Hiroshi Arita, Yukio Kurosawa | 1995-11-14 |