Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10604894 | Method of reducing waste sludge using acid treatment and method of carbonating carbon dioxide with high purity using paper mill waste sludge | Chi-Wan Jeon, Sang-Won Park, Jun Hwan Bang, Kyung Sun Song, Seung Woo Lee | 2020-03-31 |
| 8379594 | Device and method to play back contents according to reception sensitivity | Chee-hwan Yang | 2013-02-19 |