Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10715896 | Speaker and speaker mounting structure | Hiroyuki Kumakura, Akira SHIGETA | 2020-07-14 |
| 10701467 | Speaker and speaker mounting structure | Hiroyuki Kumakura, Akira SHIGETA | 2020-06-30 |
| 8265332 | Speaker diaphragm and speaker | Hiroyuki Kumakura | 2012-09-11 |