Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10566857 | Iron core and motor | Yukio Nishikawa, Tohru Kojima | 2020-02-18 |
| 8131001 | Speaker diaphragm and electrodynamic loudspeaker using the same | Kenichiro Toyofuku, Hiroyasu Kumo | 2012-03-06 |