Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8477966 | In-wall sub-woofer with high-volume displacement | An Duc Nguyen, Charles M. Sprinkle | 2013-07-02 |
| 7840018 | In-wall sub-woofer system with high-volume displacement | An Duc Nguyen, Charles M. Sprinkle | 2010-11-23 |
| 7454022 | Multi-mode ambient soundstage system | Christopher Neumann, Brian D. Castro, Ara Gharapetian, Eric Leicht | 2008-11-18 |
| D476641 | Portion of a speaker | Brian D. Castro, Christopher Neumann | 2003-07-01 |