Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10104477 | Speaker for generating sound based on digital signal | Akihiko Hosaka, Yoshiyuki Watanabe | 2018-10-16 |
| 10021473 | Digital speaker, speaker system, and earphones | Akihiko Hosaka, Yoshiyuki Watanabe | 2018-07-10 |