Patents by Inventor Seong-Min Joo

Seong-Min Joo 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).

  • Low bend loss optical fiber
    Patent number: 8081854
    Abstract: Disclosed is a low bend loss optical fiber including: a core; an inner layer disposed at outside of the core, which has a refractive index lower than a refractive index of the core, the refractive index of the inner layer gradually decreasing as it becomes farther from the core; and a trench layer disposed at outside of the inner layer, which has a lowest refractive index.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: December 20, 2011
    Assignees: SEHF-Korea Co., Ltd., Gwangju Institute of Science and Technology
    Inventors: Young-Sik Yoon, Yeong-Seop Lee, Jin-Han Kim, Won-Taek Han, Seong-Min Joo, Dea-Hwan Oh