Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7772018 | Organic electro luminescent display and manufacturing method thereof | — | 2010-08-10 |
| 7211950 | Organic electro luminescent display and manufacturing method thereof | — | 2007-05-01 |
| 6791522 | Triodic rectifier switch | Gregory Um, Sun-Hee Yang, Chang-Su Seo, Song Yi Lee | 2004-09-14 |
| 6670649 | Triodic rectifier switch | Un-Chol Oh, Won-Pil Lee, Sun-Hee Yang, Gregory Um | 2003-12-30 |