Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8111860 | Recreational bone conduction audio device, system | Martin Lenhardt | 2012-02-07 |
| 7310427 | Recreational bone conduction audio device, system | Martin Lenhardt | 2007-12-18 |