Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8908278 | Optical sheet | Sangbeum Lee, Hyunjoon Kim, Wooyoung Chang | 2014-12-09 |
| 8760764 | Regular pattern optical sheet | Sangbum Lee, Hyunjoon Kim, Wooyoung Chang, Woong Hwang | 2014-06-24 |