Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8777474 | Optical film and lighting device comprising the same | Young Il Kim, Jeong-Ho Park | 2014-07-15 |
| 8373815 | Optical sheet and liquid crystal display equipped with the same | Young Il Kim, Jeong-Ho Park | 2013-02-12 |
| 7586825 | Wave retardation plate and optical pickup device has them | Sung Min Cho, Jae Wan Jeong | 2009-09-08 |