Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6621912 | Speaker | Shigeru Sugiyama, Hajime Kitamura, Naohiro Fujinami, Hitoshi Yamashima | 2003-09-16 |
| 6577743 | Electroacoustic transducer and structure for mounting an electroacoustic transducer | Mitsuhiro Masuda, Yasunori Tsukuda | 2003-06-10 |
| 6513623 | Speaker | Shigeru Sugiyama, Hajime Kitamura, Naohiro Fujinami, Hitoshi Yamashima | 2003-02-04 |