Patents by Inventor Cheong-Hun Cho

Cheong-Hun Cho 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).

  • Mobile communication terminal and method for managing use-history information
    Patent number: 7421287
    Abstract: Disclosed is a mobile communication terminal having a subscriber identity module (SIM) card. The mobile communication terminal includes a memory unit for storing use-history information of the SIM card inserted into the mobile communication terminal according to a subscriber identity number of the inserted SIM card, and a controller for determining the subscriber identity number of the inserted SIM card, determining whether a predetermined storage area corresponding to the subscriber identity number exists in the memory unit, and generating the predetermined storage area in the memory unit when the predetermined storage area does not exist in the memory unit. Further, it is possible to search the use-history information stored in a storage area corresponding to the subscriber identity number of each SIM card carried by a user. Therefore, the security for the use-history information of the SIM card can be ensured.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: September 2, 2008
    Assignee: Sammsung Electronics Co., Ltd.
    Inventors: Cheong-Hun Cho, Yong-Hyon Kim
  • Mobile communication terminal and method for managing use-history information
    Publication number: 20050181829
    Abstract: Disclosed is a mobile communication terminal having a subscriber identity module (SIM) card. The mobile communication terminal includes a memory unit for storing use-history information of the SIM card inserted into the mobile communication terminal according to a subscriber identity number of the inserted SIM card, and a controller for determining the subscriber identity number of the inserted SIM card, determining whether a predetermined storage area corresponding to the subscriber identity number exists in the memory unit, and generating the predetermined storage area in the memory unit when the predetermined storage area does not exist in the memory unit. Further, it is possible to search the use-history information stored in a storage area corresponding to the subscriber identity number of each SIM card carried by a user. Therefore, the security for the use-history information of the SIM card can be ensured.
    Type: Application
    Filed: January 28, 2005
    Publication date: August 18, 2005
    Inventors: Cheong-Hun Cho, Yong-Hyon Kim