Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10091004 | Large-scale simultaneous digital signature service system based on hash function and method thereof | Ji-sung Choi, Dong Uk Lee | 2018-10-02 |
| 9819494 | Digital signature service system based on hash function and method thereof | Hae-il Jung, Jong-Uk Choi | 2017-11-14 |