Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11323819 | High power voice coil | Andrew Grunloh | 2022-05-03 |
| 11006220 | Loudspeaker with multiple stage suspension system | Andrew Grunloh, David E. Carlson | 2021-05-11 |
| 8781150 | Multiple magnetic air gap motor | — | 2014-07-15 |
| 8577074 | Vortex cooling of voice coils | — | 2013-11-05 |
| 7443995 | Acoustic loudspeaker | Burton A. Babb | 2008-10-28 |
| 6721435 | Acoustic loudspeaker with energy absorbing bearing and voice coil, and selective sound dampening and dispersion | Burton A. Babb | 2004-04-13 |