Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7054456 | Invertedly driven electrostatic speaker | Hidde de Haan | 2006-05-30 |
| 6459799 | Modularly expandable electrostatic speaker system | — | 2002-10-01 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7054456 | Invertedly driven electrostatic speaker | Hidde de Haan | 2006-05-30 |
| 6459799 | Modularly expandable electrostatic speaker system | — | 2002-10-01 |