Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5115883 | Loudspeaker | Hideaki Morikawa, Koushiro Kogure, Takashi Ooyaba | 1992-05-26 |
| 5117463 | Speaker system having directivity | Takashi Oyaba, Hideaki Morikawa, Naobumi Kanemaki | 1992-05-26 |
| 4991687 | Speaker system having directivity | Takashi Oyaba, Hideaki Morikawa, Naobumi Kanemaki | 1991-02-12 |