Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8107669 | Video watermarking apparatus in compression domain and method using the same | Mi Suk Huh, Dae-youb Kim, Chee Sun Won, Sung Min Kim | 2012-01-31 |
| 8094871 | Method and apparatus for inserting video watermark in compression domain | Mi Suk Huh, Dae-youb Kim, Chee Sun Won, Sung Min Kim | 2012-01-10 |
| 8081754 | Key update method and apparatus thereof | Mi Suk Huh, Dae-youb Kim | 2011-12-20 |
| 8055896 | Tag generation method in broadcast encryption system | Weon-il Jin, Maeng-hee Sung, Dae-youb Kim | 2011-11-08 |
| 8054975 | Method and system for managing key of home device in broadcast encryption (BE) system | Dae-youb Kim, Maeng-hee Sung, Weon-il Jin | 2011-11-08 |
| 8005225 | Hierarchical threshold tree-based broadcast encryption method | Dae-youb Kim, Sung-joon Park, Weon-il Jin, Dong Hoon Lee | 2011-08-23 |
| 7999840 | Method for performing video communication service and mobile communication terminal therefor | Min Hong Park, Soo-Young Nam, Chae-Whan Lim, Jeong Hoon Kim | 2011-08-16 |
| 7942335 | Radio frequency system and password management method in radio frequency system | Dae-youb Kim, Maeng-hee Sung, Weon-il Jin | 2011-05-17 |
| 7945247 | Device and method for using history menu on mobile terminal | Han Soek Nam, Bong-Kyun Kim | 2011-05-17 |
| 7929705 | Method of managing user key for broadcast encryption | Dae-youb Kim, Weon-il Jin, Sung-joon Park, Jung Hee Cheon, Myung Hwan Kim +2 more | 2011-04-19 |
| 7903868 | Video fingerprinting apparatus in frequency domain and method using the same | Mi Suk Huh, Dae-youb Kim, Won-hyung Lee, Kil Sang Yoo | 2011-03-08 |
| 7848525 | Hybrid broadcast encryption method | Dae-youb Kim, Sung-joon Park, Weon-il Jin | 2010-12-07 |
| 7810113 | Security device and head end in conditional access system and method for controlling illegal use in the system | Dae-youb Kim, Maeng-hee Sung, Weon-il Jin | 2010-10-05 |
| 7779262 | Security method using electronic signature | Dae-youb Kim, Maeng-hee Sung, Weon-il Jin | 2010-08-17 |
| 7768970 | Method and apparatus for controlling image data in a wireless terminal with normal video communication mode and image mute mode | Chae-Whan Lim | 2010-08-03 |
| 7760096 | Radio frequency identification (RFID) tag encryption method and system using broadcast encryption (BE) scheme | Weon-il Jin, Maeng-hee Sung, Dae-youb Kim, Mi Suk Huh | 2010-07-20 |
| 7755469 | Radio frequency identification tag and radio frequency identification privacy protection system and method | Maeng-hee Sung, Dae-youb Kim, Weon-il Jin | 2010-07-13 |
| 7752435 | Method for managing user key for broadcast encryption | Dae-youb Kim, Weon-il Jin, Sung-joon Park, Dong Hoon Lee, Jung Yeon Hwang | 2010-07-06 |
| 7576651 | Radio frequency identification (RFID) tag encryption method and system using broadcast encryption (BE) scheme | Weon-il Jin, Maeng-hee Sung, Dae-youb Kim, Mi Suk Huh | 2009-08-18 |
| 7486171 | RFID tag, system for purchasing service by using RFID tag, and method thereof | Dae-youb Kim, Maeng-hee Sung, Weon-il Jin | 2009-02-03 |
| 7471830 | Preprocessing device and method for recognizing image characters | Chae-Whan Lim, Nam Chul Kim, Ick-Hoon Jang, Jun Hyo Park, Chong-Heun Kim +2 more | 2008-12-30 |
| 7359688 | Device and method for displaying a status of a portable terminal by using a character image | Jeong-Wook Seo, Jae-Ho Kim, Wei-Jin Park | 2008-04-15 |