Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667697 | Colloidal silica/polyelectrolyte blends for natural water clarification | Pek L. Choo, David Picco, Michio Kobayashi | 1997-09-16 |
| 5620629 | Colloidal silica/polyelectrolyte blends for natural water clarification | Pek L. Choo, David Picco, Michio Kobayashi | 1997-04-15 |