Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6914992 | System consisting of a microphone and a preamplifier | Aart Zeger van Halteren | 2005-07-05 |
| 6888408 | Preamplifier for two terminal electret condenser microphones | Tomasz Marczak | 2005-05-03 |