Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6928177 | Speaker-use protection element and speaker device | Yukio Yasuda | 2005-08-09 |
| 5590212 | Diaphragm for a capacitance type loudspeaker | Masaru Uryu, Kunihiko Tokura, Ikuo Mizoguchi, Mamoru Ito | 1996-12-31 |