Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6595317 | Custom-moulded ear-plug device | Hans Hessel, Markus Weidmann | 2003-07-22 |
| 6540045 | Method for manufacturing an ear device and ear device | Joydeep Dutta | 2003-04-01 |
| 6533062 | Production process for custom-moulded ear-plug devices | Hans Hessel, Markus Weidmann | 2003-03-18 |