Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12281248 | Organic light-emitting element using polycyclic aromatic derivative compound | Sung-Hoon JOO, Su Jin Kim, Ji Hwan Kim, Hyeon-jun JO, Sung-eun CHOI +6 more | 2025-04-22 |
| 12137613 | Polycyclic compound and organoelectro luminescent device using same | Bong-ki SHIN, Sung-Hoon JOO, Ji Hwan Kim, Hyeon-jun JO, Sung-eun CHOI | 2024-11-05 |
| 11985891 | Polycyclic aromatic compounds and organic electroluminescent devices using the same | Sunghoon Joo, Ji Hwan Kim, Hyeon-jun JO, Sungeun Choi, Su Jin Kim +1 more | 2024-05-14 |
| 11482676 | Light emitting diode including boron compound | Sung-Hoon JOO, Ji Hwan Kim, Hyeon-jun JO, Sungeun Choi, Su Jin Kim +11 more | 2022-10-25 |
| 11476426 | Organic light emitting compounds and organic light emitting devices including the same | Se-Jin Lee, Taejung YU, Seok-Bae Park, Su Jin Lee, Bong-Hyang LEE +1 more | 2022-10-18 |
| 11456428 | Indolocarbazole derivatives and organic electroluminescent devices using the same | Sunghoon Joo, Ji Hwan Kim, Hyeon-jun JO, Sungeun Choi, Su Jin Kim | 2022-09-27 |
| 11075343 | Organic light emitting compounds and organic light emitting devices including the same | Se-Jin Lee, Taejung YU, Seok-Bae Park, Su Jin Lee, Bong-Hyang LEE +1 more | 2021-07-27 |
| 10981938 | Polycyclic aromatic compounds and organic electroluminescent devices using the same | Sunghoon Joo, Ji Hwan Kim, Hyeon-jun JO, Sungeun Choi, Su Jin Kim +1 more | 2021-04-20 |
| 10957865 | Organic light emitting compound and organic light emitting diode including the same | Yeongtae CHOI, Se-Jin Lee, Seok-Bae Park, Taejung YU, Dajung LEE | 2021-03-23 |
| 10529461 | Heterocyclic compounds and organic light-emitting diode including the same | Se-Jin Lee, Seok-Bae Park, Taejung YU, Yeong-Tae CHOI | 2020-01-07 |
| 10526342 | Organic heterocyclic compound and light-emitting device comprising same | Taejung YU, Yeong-Tae CHOI, Bong-Hyang LEE, Se-Jin Lee | 2020-01-07 |
| 9331286 | Organic electroluminescent compounds and organic electroluminescent device using the same | Sang Woo Park, Se-Jin Lee | 2016-05-03 |
| 6901625 | Dust collection unit for use in vacuum cleaner and main body of vacuum cleaner having the same | Myung Sig Yoo | 2005-06-07 |
| 6868579 | Locking device for exhaust filter cover of vacuum cleaner | — | 2005-03-22 |
| 6829805 | Locking device for exhaust filter of vacuum cleaner | — | 2004-12-14 |
| 6746500 | Cyclone dust collector | Deog Bae Park | 2004-06-08 |
| 6615442 | Vacuum cleaner | — | 2003-09-09 |
| 6524358 | Cyclone dust collector and vacuum cleaner using such dust collector | — | 2003-02-25 |
| 6350292 | Cyclone collector for a vacuum cleaner having a flow guide | Sung Hwa Lee, Dong Jin Kwack, Hyeok Seong An, Kyoung Suk Lim, Jun-Sang Park | 2002-02-26 |
| 5319827 | Device of sensing dust for a vacuum cleaner | — | 1994-06-14 |