Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6691832 | Speaker | Fuminori Moritake, Shigeru Sugiyama, Tomoyuki Sato, Yoshio Imahori | 2004-02-17 |
| 6674872 | Speaker | Fuminori Moritake, Tomoyuki Sato | 2004-01-06 |
| 6621912 | Speaker | Shigeru Sugiyama, Hajime Kitamura, Yoshio Imahori, Hitoshi Yamashima | 2003-09-16 |
| 6513623 | Speaker | Shigeru Sugiyama, Hajime Kitamura, Yoshio Imahori, Hitoshi Yamashima | 2003-02-04 |
| 6484844 | Speaker | Shigeru Sugiyama, Hajime Kitamura, Masami Kushida, Hisashi Kubota | 2002-11-26 |
| 6476711 | Sounding-body driving circuit and operating sound generating apparatus using the same | Hajime Kitamura, Katsuyoshi Omori | 2002-11-05 |