Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8022775 | Systems and methods for maintaining a drive signal to a resonant circuit at a resonant frequency | Stephen D. Julstrom | 2011-09-20 |
| 7881486 | Directional microphone assembly | Mead C. Killion, Robert B. Schulein, Viorel Drambarean, Andrew J. Haapapuro, John S. French | 2011-02-01 |