Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6766878 | Custom-moulded ear-plug, and process for producing a custom-moulded ear-plug device | Christoph Widmer, Markus Weidmann | 2004-07-27 |
| 6731997 | Method for manufacturing hearing devices | Christoph Widmer | 2004-05-04 |