Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5862242 | Speaker | Hiroyuki Takewa, Akihiro Furuta, Kazue Satoh, Mikio Iwasa | 1999-01-19 |
| 5664024 | Loudspeaker | Akihiro Furuta, Kazue Satoh, Hiroyuki Takewa, Mikio Iwasa, Shinya Mizone | 1997-09-02 |