Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8320601 | Earphone device and sound generating apparatus equipped with the same | Yoshikatsu Matsubara, Masahiro Sugiura, Yasuaki Takano | 2012-11-27 |
| 8270657 | Earphone device and sound generating apparatus equipped with the same | Yoshikatsu Matsubara, Masayoshi Yamashita, Nobushiro Aiba, Tsuneyasu Demukai | 2012-09-18 |
| 8090134 | Earphone device, sound tube forming a part of earphone device and sound generating apparatus | Yoshikatsu Matsubara, Tsuneyasu Demukai | 2012-01-03 |
| 7977564 | Electronic keyboard musical instrument | — | 2011-07-12 |
| 7786372 | Wind musical instrument with pitch changing mechanism and supporting system for pitch change | Shuichi Sawada, Hideo Suzuki, Akihiko Komatsu, Nariyasu Yaguchi, Yoshinori Hayashi | 2010-08-31 |
| 7402738 | Wind musical instrument equipped with slide and supporting system for assisting player in performance | Shuichi Sawada, Hideo Suzuki, Yoshinori Hayashi, Akihiko Komatsu, Nariyasu Yaguchi | 2008-07-22 |
| 7385134 | Wind musical instrument having pads for closing tone holes with mechanical assistance and supporting system used therein | Shuichi Sawada, Hideo Suzuki, Yoshinori Hayashi, Akihiko Komatsu, Nariyasu Yaguchi | 2008-06-10 |