Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9136551 | Sulphonate based compound, polymer electrolyte membrane comprising same and fuel cell comprising same | Hyejin Kwon, Seong Ho Choi, Sergey Ulyakhin, Chong Kyu Shin | 2015-09-15 |
| 5978342 | Disk tray for disk player having eccentric disk receiving portions | Seoung-sam Ju | 1999-11-02 |