Issued Patents 2019
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10515619 | Portable smart electronic device for noise attenuating and audio broadcasting | Cheng-Yuan Chang | 2019-12-24 |
| 10171907 | Fan noise controlling system | Cheng-Yuan Chang | 2019-01-01 |