Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10212504 | Earphone device | Kenji Ide, Naotaka Tsunoda | 2019-02-19 |
| 9451350 | Earphone device | Kenji Ide, Naotaka Tsunoda | 2016-09-20 |
| 9025799 | Sound reproducing device | Noriyuki Ozawa, Kohei Asada, Naotaka Tsunoda | 2015-05-05 |
| 7065219 | Acoustic apparatus and headphone | Kensaku Abe, Hirofumi Nishimoto, Keiko Yabuki | 2006-06-20 |
| 6211748 | FM modulator | Kensaku Abe, Yoshihiro Sugimoto, Nobuo Kobayashi | 2001-04-03 |
| 5781638 | Electro-acoustic transducer | Akihiko Hosaka, Kensaku Abe | 1998-07-14 |