Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6955331 | Axial valve | Erik Casper Joergensen, Michael Birkelund | 2005-10-18 |
| 5144674 | Digital programming device for hearing aids | Wolfram Meyer, Eduard Kaiser, Ullrich Sigwanz | 1992-09-01 |