Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6831828 | Gas-insulated switchgear | Hiroyuki Hama, Takuya Ootsuka, Kouichi Oosumi, Yoshinori Shimizu, Kiyoshi Inami | 2004-12-14 |
| 6717499 | Transformer for gas insulated electric apparatus | Yasuhiro Maeda, Hiroyuki Hama | 2004-04-06 |
| 6680665 | Three-phase current transformer | Yasuhiro Maeda, Hiroyuki Hama | 2004-01-20 |
| 6661234 | Failure determining apparatus of gas-insulated electrical appliance | Kuniaki Nakashima, Hiroshi Doi, Yasuhiro Maeda, Hiroyuki Hama, Naoyuki Kajita +1 more | 2003-12-09 |
| 6424059 | Gas insulated switching device | Yasuhiro Maeda, Mitsuo Matsumoto, Hiroyuki Hama | 2002-07-23 |