Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6595317 | Custom-moulded ear-plug device | Christoph Widmer, Hans Hessel | 2003-07-22 |
| 6533062 | Production process for custom-moulded ear-plug devices | Christoph Widmer, Hans Hessel | 2003-03-18 |