Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D828821 | Loudspeaker | — | 2018-09-18 |
| 9369817 | Broad sound field loudspeaker system | Donald J. North, Dennis Barnes | 2016-06-14 |
| D743937 | Loudspeaker | — | 2015-11-24 |
| 8571252 | Driver assembly for loudspeakers | Donald J. North | 2013-10-29 |