Issued Patents 2011
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7991181 | Loudspeaker system | Toshiyuki Matsumura | 2011-08-02 |
| 7974423 | Loudspeaker system | Toshiyuki Matsumura, Sawako Kano, Mitsukazu Kuze | 2011-07-05 |
| 7974431 | Speaker system | — | 2011-07-05 |
| 7953240 | Loudspeaker apparatus | Toshiyuki Matsumura | 2011-05-31 |
| 7885425 | Electrodynamic electroacoustic transducer and electronic device | Toshiyuki Matsumura, Sawako Kano, Koji Sano | 2011-02-08 |