Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4418787 | Hearing aid with audio path duct extension element, and extension element attachment | Albert Eggert, Joachim Kwiatkowski | 1983-12-06 |
| 4395601 | Modular hearing aid | Wolfgang Kopke, Manfred Muller, Wolfgang Schmidt, Albert Eggert, Gerhard Raupach | 1983-07-26 |