Issued Patents All Time
Showing 51–57 of 57 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7388035 | Method for preparing poly(2,5-benzimidazole) | Hyoung-Juhn Kim, Yeong-Chan Eun, Ho-Jin Kweon | 2008-06-17 |
| 7244791 | Method for preparing sulfonated polystyrene for polymer electrolyte of fuel cell | Hyoung-Juhn Kim, Ho-Jin Kweon, Yeong-Chan Eun | 2007-07-17 |
| 6734290 | Dyes and methods of preparing them | Tae Chung Kang, Woo-Jin Yoon, Sang Yang, Sung Il Myung, Ho Bin Lee | 2004-05-11 |
| 5858026 | Dicyclic metal complex formazan derivatives, process for producing the same, composition containing the same and dyeing process employing the same | Dong-Gil KIM | 1999-01-12 |
| 5371274 | Methods for producing ethylidene diacetate using catalysts supported on an organic carrier | Dae Chul Park, Woo Sung Chang | 1994-12-06 |
| 5371275 | Methods for preparing ethylidene diacetate | Dae Chul Park | 1994-12-06 |
| 5258827 | Method for adjusting video signal gain | — | 1993-11-02 |