Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7527901 | Method of repairing phase shift mask | Jeong Yun Lee, Seong-woon Choi, Il-Yong Jang, Sung-Jae Han | 2009-05-05 |
| 7521156 | Photo mask and method of correcting the transmissivity of a photo mask | Moon Gyu Sung, Seong-woon Choi, Sung-Yong Cho, Jeong Yun Lee | 2009-04-21 |