Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7877813 | Copy protection method and system for digital media | Hyung Sun Kim, Byung Jin Kim, Soung Hyun Um | 2011-01-25 |
| 7254838 | Copy protection method and system for digital media | Hyung Sun Kim, Byung Jin Kim, Soung Hyun Um | 2007-08-07 |