Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12309546 | Directivity pattern control waveguide for a speaker, and speaker including a directivity pattern control waveguide | Erik Wiederholtz | 2025-05-20 |
| 12047738 | Directivity pattern control waveguide for a speaker, and speaker including a directivity pattern control waveguide | Erik Wiederholtz | 2024-07-23 |
| 12041414 | Directivity pattern control waveguide for a speaker, and speaker including a directivity pattern control waveguide | Erik Wiederholtz | 2024-07-16 |