Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11808749 | Method of estimating chemical oxygen demand of water | Ruey-An Doong | 2023-11-07 |
| 11474091 | Color chart, test kit, and method of estimating chemical oxygen demand of water | Ruey-An Doong | 2022-10-18 |