Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D1064588 | Earphone case | Steven J. Iseberg | 2025-03-04 |
| 9232292 | Electronic earplug windscreen | Andrew J. Haapapuro, Stephen D. Julstrom, Viorel Drambarean | 2016-01-05 |
| 9198800 | Electronic earplug for providing communication and protection | Mead C. Killion, James Smarr Collins, Russ Thoma, Viorel Drambarean, Andrew J. Haapapuro +1 more | 2015-12-01 |
| 8649540 | Electronic earplug | Mead C. Killion, Stephen D. Julstrom, Viorel Drambarean | 2014-02-11 |
| 8460816 | Rechargeable battery assemblies and methods of constructing rechargeable battery assemblies | Stephen D. Julstrom, Mead C. Killion, John Edward Oltman | 2013-06-11 |
| 8237402 | Magnetically coupled battery charging system | Stephen D. Julstrom | 2012-08-07 |
| 8174233 | Magnetically coupled battery charging system | Stephen D. Julstrom | 2012-05-08 |
| 8174234 | Magnetically coupled battery charging system | Stephen D. Julstrom | 2012-05-08 |
| 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 |
| 7832080 | Directional microphone assembly | Mead C. Killion, Robert B. Schulein, Viorel Drambarean, Andrew J. Haapapuro, John S. French | 2010-11-16 |
| 7697705 | High fidelity digital hearing aid and methods of programming and operating same | Mead C. Killion, John S. French, Steven Viranyi, David A. Preves, Norman P. Matzen +1 more | 2010-04-13 |
| 7286677 | Directional microphone assembly | Mead C. Killion, Robert B. Schulein, Viorel Drambarean, Andrew J. Haapapuro, John S. French | 2007-10-23 |
| 6831987 | Directional microphone assembly | Mead C. Killion, Jonathan K. Stewart, Don Wilson, Matthew Roberts, Steve Iseberg | 2004-12-14 |
| 6798890 | Directional microphone assembly | Mead C. Killion, Robert B. Schulein, Viorel Drambarean, Andrew J. Haapapuro, John S. French | 2004-09-28 |
| 6567526 | Directional microphone assembly | Mead C. Killion, Jonathan K. Stewart, Don Wilson, Matthew Roberts, Steve Iseberg | 2003-05-20 |
| 6285771 | Directional microphone assembly | Mead C. Killion, Jonathan K. Stewart, Don Wilson, Matthew Roberts, Steve Iseberg | 2001-09-04 |
| 6151399 | Directional microphone system providing for ease of assembly and disassembly | Mead C. Killion, Robert B. Schulein | 2000-11-21 |
| 6134334 | Directional microphone assembly | Mead C. Killion, Jonathan K. Stewart, Don Wilson, Matthew Roberts, Steve Iseberg | 2000-10-17 |
| 6075869 | Directional microphone assembly | Mead C. Killion, Jonathan K. Stewart, Don Wilson, Matthew Roberts, Steve Iseberg | 2000-06-13 |
| 5878147 | Directional microphone assembly | Mead C. Killion, Jonathan K. Stewart, Don Wilson, Matthew Roberts, Steve Iseberg | 1999-03-02 |