Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11910174 | Radially arcuated unistructural speaker cone with segmented dome | — | 2024-02-20 |
| 6026929 | High frequency radially arcuated center speaker cone with variable thickness | — | 2000-02-22 |
| 6028947 | Lightweight molded waveguide device with support infrastructure | John Lemon | 2000-02-22 |
| 5991421 | Radially expanding multiple flat-surfaced waveguide device | — | 1999-11-23 |
| 5880412 | High frequency radially arcuated center speaker cone | — | 1999-03-09 |
| 5847332 | Polycarbonate-based radially arcuated speaker cone | — | 1998-12-08 |
| 4881617 | Radially arcuated speaker cone | — | 1989-11-21 |