Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10251051 | Method for providing multi number service | Chung Il Cho, Sung Hwan Kim, Chang Yong Choi, Joo Yeol Oh, Hyun-Sung Hong | 2019-04-02 |
| 10136307 | Method for providing multi number service | Chung Il Cho, Sung Hwan Kim, Chang Yong Choi, Joo Yeol Oh, Hyun-Sung Hong | 2018-11-20 |
| 9832634 | Method for providing multi-number service | Chung Il Cho, Sung Hwan Kim, Chang Yong Choi | 2017-11-28 |