Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5646386 | Vacuum interrupter | Hideaki Toya, Hiroshi Hasegawa, Kenichi Koyama | 1997-07-08 |
| 5597993 | Vacuum interrupter | Hideaki Toya, Hiroshi Hasegawa, Kenichi Koyama | 1997-01-28 |
| 5495085 | Vacuum interrupter | Hideaki Toya, Hiroshi Hasegawa, Kenichi Koyama | 1996-02-27 |
| 5293506 | Vacuum switch tube including windmill electrodes | — | 1994-03-08 |
| 5118911 | High voltage vacuum insulating container | — | 1992-06-02 |
| 5103069 | Electrode for a vacuum breaker | — | 1992-04-07 |
| 4760222 | Vacuum circuit interrupter | — | 1988-07-26 |
| 4740662 | Vacuum circuit interrupter | — | 1988-04-26 |
| 4585913 | Bellows device | — | 1986-04-29 |
| 4540861 | Contact material for vacuum circuit interrupter | Mitsuhiro Okumura, Eizo Naya, Yasushi Takeya | 1985-09-10 |
| 4537743 | Electrode composition for vacuum switch | Takashi Yamanaka, Yasushi Takeya, Toshiaki Horiuchi, Kouichi Inagaki, Eizo Naya +2 more | 1985-08-27 |
| 4499009 | Electrode composition for vacuum switch | Takashi Yamanaka, Yasushi Takeya, Toshiaki Horiuchi, Kouichi Inagaki, Eizo Naya +2 more | 1985-02-12 |
| 4473731 | Vacuum circuit interrupter | — | 1984-09-25 |