Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11330373 | Dome type diaphragm, balanced dome diaphragm, and speaker | Tomoaki Ogata, Kazuyuki Inagaki | 2022-05-10 |
| 10715896 | Speaker and speaker mounting structure | Hiroyuki Kumakura, Koji Yamazawa | 2020-07-14 |
| 10701467 | Speaker and speaker mounting structure | Hiroyuki Kumakura, Koji Yamazawa | 2020-06-30 |
| 10264359 | Speaker damper and speaker unit | Hiroaki Kawai, Satoshi TOMIZAWA | 2019-04-16 |