Patents per Year
Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 11856382 | Acoustic transducer having drop ring connected at resonant node | Kelvin Francis Griffiths | 2023-12-26 | $13,122,000 |
| 10645521 | Stereo and filter control for multi-speaker device | Ryan J. Mihelich, Tomlinson Holman, Alexander P. Niemeyer | 2020-05-05 | $109,977,000 |
| 10148800 | Acoustic compensation chamber for a remotely located audio device | Austin L. Frederickson, Mitchell Heschke, Lee B. Hamstra | 2018-12-04 | $82,334,000 |
| 9949057 | Stereo and filter control for multi-speaker device | Ryan J. Mihelich, Tomlinson Holman, Alexander P. Niemeyer | 2018-04-17 | $62,412,000 |