Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10942059 | Online monitoring method for metering performance of diaphragm gas meter | Changsong YU, Changjiang Li, Guoyong Cheng | 2021-03-09 |
| 10109437 | Key sound generation device for silicone keyboard | Changshun Fang | 2018-10-23 |