Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6621009 | Electrical conductor support insulator | Michiharu Okuno, Aiichiro Hashizume, Masahiro Arioka, Masaaki Takeshita | 2003-09-16 |
| 6518531 | Gas-insulated switchgear | Masahiro Arioka | 2003-02-11 |
| 6504125 | Gas-filled switching apparatus | — | 2003-01-07 |
| 5077453 | Arc-extinguisher of a switch | Hiroshi Hasegawa, Toshimasa Maruyama | 1991-12-31 |