Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11658308 | Fuel cells and method of manufacturing | Hyelim Choi, Ok Hee Kim, Yung-Eun Sung, Heeman Choe | 2023-05-23 |
| 10978715 | Fuel cells and method of manufacturing | Hyelim Choi, Ok Hee Kim, Yung-Eun Sung, Heeman Choe | 2021-04-13 |
| 10265773 | Metal foam for electrode of secondary lithium battery, preparing method thereof, and secondary lithium battery including the metal foam | Ji-Hyun Um, Hyeji Park, Myounggeun Choi, Hyelim Choi, Yung-Eun Sung +1 more | 2019-04-23 |
| 9203093 | Fuel cell electrode | Nak Hyun Kwon, In-chul Hwang, Jae Seung Lee, Bum Wook Roh, Yung-Eun Sung +4 more | 2015-12-01 |
| 9123965 | Method of preparing nano-sized catalyst on carbon support | Nak Hyun Kwon, Inchul Hwang, Jae Seung Lee, Yung-Eun Sung, Tae-Yeol Jeon +2 more | 2015-09-01 |
| 8119306 | Bipolar plate and direct liquid feed fuel cell stack | Kyoung-hwan Choi, Jong-Koo Lim, Il Moon | 2012-02-21 |
| 7951506 | Bipolar plate and direct liquid feed fuel cell stack | Kyoung-hwan Choi, Jong-Koo Lim, Il Moon | 2011-05-31 |
| 7825057 | Method for preparing the mixed electrode catalyst materials for a PEM fuel cell | Nak Hyun Kwon, Yung-Eun Sung, In Su PARK, In-chul Hwang, Il Hee Cho | 2010-11-02 |
| 7724082 | Method and apparatus for pulse width modulation in a switching amplifier | Sang Jin Park, Yun Do Kim | 2010-05-25 |
| 6888403 | Pulse width modulation type audio amplifier having variable average switching frequency | Bong-joo Kim | 2005-05-03 |
| 6606423 | Image format converting method and apparatus | — | 2003-08-12 |
| 5963665 | Image enhancing method using mean-separate histogram equalization and a circuit therefor | Young Taek Kim | 1999-10-05 |
| 5959681 | Motion picture detecting method | — | 1999-09-28 |
| 5862254 | Image enhancing method using mean-matching histogram equalization and a circuit therefor | Young Taek Kim | 1999-01-19 |
| 5833442 | Scroll-type compressor having improved pressure equalizing passage configuration | Wan Pyo Park, Hiun Won, Do Sig Choi | 1998-11-10 |
| 5786862 | Method and apparatus for interpolating pixels based on wide-vector correlations | Yeong-Taeg Kim | 1998-07-28 |