Patents by Inventor Duck-Sung Kim

Duck-Sung Kim 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).

  • USER EQUIPMENT AND ROAMING SETUP METHOD FOR SELECTING PUBLIC LAND MOBILE NETWORK
    Publication number: 20100099403
    Abstract: A user equipment and a roaming setup method for selecting a public land mobile network for global roaming by receiving a roaming area through a user interface; storing, at a user equipment, identification information of a public land mobile network in the roaming area in preferred public land mobile network identification information of a subscriber identity module; and removing, at the user equipment, last registered public land mobile network identification information from location information of the subscriber identity module. The roaming setup method and user equipment improve a public land mobile network selection procedure to reduce the amount of time and prevent errors during the public land mobile network selection procedure in a roaming area.
    Type: Application
    Filed: August 7, 2009
    Publication date: April 22, 2010
    Applicant: Pantech Co., Ltd.
    Inventor: Duck-sung KIM
  • Call error prevention
    Patent number: 7532707
    Abstract: A call error prevention method comprises the steps of inputting a call number, checking whether the input number is a recognizable call service code, determining whether the input number contains the same number of digits as a recognized call service code, and generating an input error warning if the input number does not contain the same number of digits as the recognized call service code.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: May 12, 2009
    Assignee: LG Electronics, Inc.
    Inventor: Duck-Sung Kim
  • Call error prevention
    Publication number: 20040179673
    Abstract: A call error prevention method comprises the steps of inputting a call number, checking whether the input number is a recognizable call service code, determining whether the input number contains the same number of digits as a recognized call service code, and generating an input error warning if the input number does not contain the same number of digits as the recognized call service code.
    Type: Application
    Filed: March 12, 2004
    Publication date: September 16, 2004
    Applicant: LG Electronic Inc.
    Inventor: Duck-Sung Kim