Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9438989 | Headphone structure for adjusting audio frequencies | Ping-Tang Lee | 2016-09-06 |
| 9258630 | Coaxial audio speaker using single audio source | Pin-Tang Lee, Shoichi Taniguchi | 2016-02-09 |
| 9210489 | Off-axial audio speaker using single audio source | Pin-Tang Lee, Taniguchi Shoichi | 2015-12-08 |
| 9210513 | Multiple-ring coaxial audio speaker using single audio source | Taniguchi Shoichi | 2015-12-08 |
| 9124976 | Treble and bass headphone structure | Pin-Tang Lee | 2015-09-01 |
| 8744111 | Earphone with tension diaphragm | — | 2014-06-03 |