Issued Patents 2020
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10801635 | Fixing structure for protective cover of valve assembly | Tachun Chang, Kaizhong He | 2020-10-13 |
| 10627005 | Valve assembly capable of indicating depth | Tachun Chang, Kaizhong He | 2020-04-21 |
| 10557771 | Test cylinder of valve assembly and connection structure for the same | Tachun Chang, Kaizhong He | 2020-02-11 |