Issued Patents 2019
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10415712 | Air admittance valve preventing mephitis overflow | Michael Chiang | 2019-09-17 |
| 10184571 | Valve structure with elastic anti-leakage member | Shen-En Chiang | 2019-01-22 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10415712 | Air admittance valve preventing mephitis overflow | Michael Chiang | 2019-09-17 |
| 10184571 | Valve structure with elastic anti-leakage member | Shen-En Chiang | 2019-01-22 |