Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8133641 | Half tone mask having multi-half permeation part and a method of manufacturing the same | Jae Woo Park, Sang Uk Park, Yu-Kyung Sim, Keun Sik Lee | 2012-03-13 |
| 7704646 | Half tone mask and method for fabricating the same | Sang Uk Park, Keun Sik Lee, Jae Woo Park, Yu-Kyung Sim | 2010-04-27 |