Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8270657 | Earphone device and sound generating apparatus equipped with the same | Souichi Takigawa, Yoshikatsu Matsubara, Masayoshi Yamashita, Nobushiro Aiba | 2012-09-18 |
| 8090134 | Earphone device, sound tube forming a part of earphone device and sound generating apparatus | Souichi Takigawa, Yoshikatsu Matsubara | 2012-01-03 |