Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9453950 | Photochromic coating process | Kathy Wai Yuen Wong, David Lewis, Fang Chen, Huan Kiak Toh | 2016-09-27 |
| 6313251 | High index/high abbe number composition | Huan Kiak Toh, Ian Roger Bateman, David Robert Diggins | 2001-11-06 |
| 6166158 | High index/high abbe number composition | Huan Kiak Toh, Ian Roger Bateman, David Robert Diggins | 2000-12-26 |
| 5977276 | High index/high Abbe number composition | Huan Kiak Toh, Ian Roger Bateman, David Robert Diggins | 1999-11-02 |