Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |