Patents by Inventor Jun-Soo Yook

Jun-Soo Yook 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).

  • Repeating installation using telephone line
    Patent number: 6738597
    Abstract: A repeating apparatus of the present invention converts a data signal from the mobile switching center to an intermediate frequency signal and transfers the intermediate frequency signal to an unused telephone line and a dedicated line network. The apparatus converts the intermediate frequency signal transferred through the unused telephone line and the dedicated line network to the data signal frequency signal and transfers the data signal to the mobile switching center. In the present invention, the intermediate frequency signal is transferred between a mother station and at least one first child station through the unused telephone line and the intermediate frequency signal is modulated to transfer between the mother station and at least one second child station through the dedicated line network.
    Type: Grant
    Filed: July 16, 2001
    Date of Patent: May 18, 2004
    Assignee: SK Telecom Co., Ltd.
    Inventors: Ha-Jae Jeung, Jun-Soo Yook