Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11177544 | Battery device | Changjian Shao | 2021-11-16 |
| 10942059 | Online monitoring method for metering performance of diaphragm gas meter | Changsong YU, Guoyong Cheng, Rongshu Li | 2021-03-09 |