Patents by Inventor Juseok Ham

Juseok Ham has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Electron transport material and organic electroluminescent device using the same
    Patent number: 9147849
    Abstract: Provided are a new electron transport material and an organic electroluminescent device including the same. The electron transport material according to the present invention may have the excellent luminescence property and reduce the driving voltage to increase the power efficiency, such that the organic electroluminescent device using less consumption power may be manufactured.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: September 29, 2015
    Assignee: Alpha Chem Co., Ltd.
    Inventors: Hyun-Goog Nam, Dae Won Lim, Je-yong Kim, Sang-mi Park, Seung-hee Jang, Sang Youn Lee, Juseok Ham, Kyu-oh Cho, Hyun-don Kim