Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10120418 | Portable keyboard | Seungjin Lee, Dongguk Kang, Hojung Lee | 2018-11-06 |
| 9411381 | Portable keyboard | Seungjin Lee, Dongguk Kang, Hojung Lee | 2016-08-09 |
| 9019694 | Portable keyboard | Seungjin Lee, Dongguk Kang, Hojung Lee | 2015-04-28 |