Koyanagi; Osamu
Patent Applications and Registrations
Patent applications and USPTO patent grants for Koyanagi; Osamu.The latest application filed is for "gas-insulated switchgear".
- Koyanagi; Osamu - Hitachi JP
- Koyanagi; Osamu - Yono JP
| Patent | Date |
|---|---|
| Gas-insulated switchgear Grant 6,621,030 - Andou , et al. September 16, 2 | 2003-09-16 |
| Gas-insulated switchgear App 20030094436 - Andou, Tomoyuki ; et al. | 2003-05-22 |
| Puffer type gas circuit breaker Grant 5,814,781 - Koyanagi , et al. September 29, 1 | 1998-09-29 |
| Switch mechanism Grant 5,502,290 - Koyanagi , et al. March 26, 1 | 1996-03-26 |
| Gas circuit breaker Grant 5,153,397 - Seki , et al. October 6, 1 | 1992-10-06 |
| Gas circuit breaker Grant 5,079,392 - Tsukushi , et al. January 7, 1 | 1992-01-07 |
| Compressed-gas circuit interrupter with a heater Grant 4,434,335 - Natsui , et al. February 28, 1 | 1984-02-28 |
| Pharmaceutical vehicle Grant 4,344,968 - Aoda , et al. August 17, 1 | 1982-08-17 |
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