Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11070179 | Apparatus and method for measuring speaker transducer impedance versus frequency with ultralow inaudible signal | Frank Cheng, Zhong You | 2021-07-20 |
| 10972061 | Class-D amplifier with multiple independent output stages | Zhaohui He, Rahul Singh | 2021-04-06 |