Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9594293 | Method and apparatus for uniformly focused ring light | Tzyy-Shuh Chang, Hsun-Hau Huang | 2017-03-14 |
| 9291877 | Method and apparatus for uniformly focused ring light | Tzyy-Shuh Chang, Hsun-Hau Huang | 2016-03-22 |