Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6063997 | Gas insulated electric apparatus | Fumihiro Endo, Tomoaki Utsumi, Toshio Ishikawa, Tokio Yamagiwa | 2000-05-16 |
| 6002085 | Gas insulated switchgear | Tomoaki Utsumi, Toshio Ishikawa, Fumihiro Endo, Tokio Yamagiwa | 1999-12-14 |
| 5256976 | Power apparatus and method of location of a fault in a power apparatus on the basis of attenuation coefficients of electromagnetic coefficients of fault generated electromagnetic waves | Toshio Ishikawa, Fumihiro Endo, Tomoaki Utsumi, Tokio Yamagiwa, Yoshinori Tagawa | 1993-10-26 |