Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D311521 | Combined earphone and microphone | Finn Jensen, Karsten Langhorn, Nikolai Bisgaard | 1990-10-23 |
| 4893344 | Headset having a post auricle mount and arranged to be worn on a person's outer ear | Jan Tragardh, Finn Jensen | 1990-01-09 |