Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684109 | Composition comprising a tannin-containing copolymer | Jen-Chi Chen, Fu Chen | 1997-11-04 |
| 5643462 | Composition and method for water clarification | Jen-Chi Chen, Fu Chen, Stephen R. Vasconcellos | 1997-07-01 |