Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7938895 | Gas-insulated switchgear apparatus and gas filter device | Masanori Osumi | 2011-05-10 |
| 7931741 | Gas-insulated switchgear apparatus and gas filter device | Masanori Osumi | 2011-04-26 |