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Patent applications and USPTO patent grants for Choi; Sangwook.The latest application filed is for "proton exchange composite membranes, composite solutions, and method for manufcturing and fuel cell using the same".
Patent | Date |
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Table top for display stand Grant D812,946 - Chang , et al. March 20, 2 | 2018-03-20 |
Cradle for electronic device Grant D811,380 - Choi , et al. February 27, 2 | 2018-02-27 |
Charger Grant D810,678 - Choi , et al. February 20, 2 | 2018-02-20 |
Table top for a display stand Grant D804,229 - Chang , et al. December 5, 2 | 2017-12-05 |
Table leg for a display stand Grant D802,973 - Chang , et al. November 21, 2 | 2017-11-21 |
Table leg for a display stand Grant D796,881 - Chang , et al. September 12, 2 | 2017-09-12 |
Proton exchange composite membranes, composite solutions, and method for manufacturing and fuel cell using the same Grant 7,029,559 - Won , et al. April 18, 2 | 2006-04-18 |
Proton exchange composite membranes, composite solutions, and method for manufcturing and fuel cell using the same App 20030054219 - Won, Jongok ;   et al. | 2003-03-20 |
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