Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6827178 | Method for manufacturing an ear device and ear device | Joydeep Dutta | 2004-12-07 |
| 6766878 | Custom-moulded ear-plug, and process for producing a custom-moulded ear-plug device | Hans Hessel, Markus Weidmann | 2004-07-27 |
| 6731997 | Method for manufacturing hearing devices | Hans Hessel | 2004-05-04 |