Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10785575 | Electrostatic transducer | Duncan Billson, Kevin Walsh | 2020-09-22 |
| 10349183 | Electrostatic transducer | Duncan Billson, Kevin Walsh | 2019-07-09 |
| 9692372 | Amplifier for electrostatic transducers | Duncan Billson, David Hoare | 2017-06-27 |
| 9503821 | Electrostatic transducer | Duncan Billson, David Hoare | 2016-11-22 |
| D719437 | Square base pyramid corner bracket | — | 2014-12-16 |