Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9659580 | Moving-magnet type pickup cartridge | — | 2017-05-23 |
| 9497548 | Moving-coil type stereo pickup cartridge | — | 2016-11-15 |
| 8233655 | Headphone | — | 2012-07-31 |
| 8098873 | Headphones | Okitsugu Furuya, Yosuke Sato | 2012-01-17 |
| 7418786 | Marking device | — | 2008-09-02 |
| 6081604 | Electric sound converter | Hideto Hikichi, Hiroyuki Suzuki | 2000-06-27 |