Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11882400 | Directional loudspeaker | — | 2024-01-23 |
| 10375474 | Hybrid horn microphone | Haohai Sun | 2019-08-06 |
| 9485587 | Speaker device assembly with recoil vibration attenuating counter balance | Øivind Stuan, Kevin Lee Hughes | 2016-11-01 |
| 8953830 | Horn loudspeaker and a sound source | — | 2015-02-10 |