Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9369787 | Shielded audio apparatus | Antero Tossavainen, Jian Guo | 2016-06-14 |
| 9301053 | Audio transducer with electrostatic discharge protection | Jian Guo, Antero Tossavainen, Jingyu Huang | 2016-03-29 |