Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8013703 | Multi-parallel magnetic-field cancellation type transformer | Masao Nagano, Mitsuaki Hirakawa | 2011-09-06 |
| 7948221 | Electric power converter | Yasuto Watanabe, Mitsuaki Hirakawa | 2011-05-24 |