Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10075545 | Apparatus and method for managing zone presence | Chang-Sup KEUM, Hyun Kyung YOO, Jong Choul YIM, Ki Sook Chung | 2018-09-11 |
| 7194250 | Method of providing credit card calling service based on camel in UMTS | Dong Man JANG, Dae Ung Kim | 2007-03-20 |