Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9500125 | Combustion pressure measuring plug for a combustion engine | Serge Groenhuijzen, Jan-Willem Sloetjes | 2016-11-22 |
| 7925037 | Communications headset | — | 2011-04-12 |
| 7613292 | Adjustable earpiece | — | 2009-11-03 |