Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 11070179 | Apparatus and method for measuring speaker transducer impedance versus frequency with ultralow inaudible signal | Ruoxin Jiang, Zhong You | 2021-07-20 | $6,178,000 |