Patents by Inventor Cheol-Hyun Kang

Cheol-Hyun Kang 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).

  • Publication number: 20240326384
    Abstract: The present disclosure relates to an optical laminate including: a glass substrate; a pressure-sensitive adhesive layer formed on one surface of the glass substrate; a metal layer pattern formed on one surface of the pressure-sensitive adhesive layer; and a functional layer provided on a portion on one surface of the pressure-sensitive adhesive layer on which the metal layer pattern is not formed, wherein the pressure-sensitive adhesive layer contains a silicone-based pressure-sensitive adhesive, and the functional layer includes a solder resist layer, and a method for manufacturing the optical laminate.
    Type: Application
    Filed: March 19, 2024
    Publication date: October 3, 2024
    Inventors: Sung-Jin NOH, Goo-Hyun KANG, Sang-Won YUN, Jun-Gu LEE, Ki-Joon PARK, Cheol-Hun LEE
  • Patent number: 7043238
    Abstract: Disclosed is a CDMA terminal for providing a CDMA service to a global system for mobile communications (GSM) service subscriber in a CDMA service area which comprises: a subscriber identity module (SIM) cardholder for installing or uninstalling a SIM card of a GSM service subscriber, wherein when a SIM card of the GSM service subscriber is installed in the SIM cardholder in the CDMA service area, specific data are transmitted using a CDMA message in the case of authenticating the GSM service subscriber using information on the GSM service subscriber stored in the SIM card, and when the authentication of the GSM service subscriber is normally completed, the CDMA terminal is used for the GSM service subscriber as a roaming service terminal in the CDMA service area. According to the present invention, the GSM service subscriber can use his SIM card and number in the CDMA service area.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: May 9, 2006
    Assignee: Ktfreetel Co., Ltd.
    Inventors: Byung-Ik Ahn, Chan-Ho Yun, Yuon-Pil Jeung, Kwang-Wouk Lee, Cheol-Hyun Kang, Seong-Jin Choi
  • Patent number: 6681111
    Abstract: Disclosed is a roaming service system in a CDMA service area for GSM service subscribers, which comprises a CDMA system comprising a CDMA HLR storing information on subscribers' locations and services, a CDMA MSC connected to the CDMA HLR and accessing calls, and a CDMA terminal wirelessly connected to the CDMA MSC and capable of having a SIM card removably installed therein; a GSM system comprising a GSM HLR storing information on the subscribers' locations and services, a GSM MSC connected to the GSM HLR and accessing calls, an authentication center (AuC) connected to a GSM network and authenticating terminals, and a GSM terminal wirelessly connected to the GSM MSC; and an IRGS connected between the CDMA system and the GSM system and converting signals to execute signal communications between the systems, and when a subscriber of a service provided by the GSM system moves to an area in which the subscriber can use the service provided by the CDMA system and installs the subscriber's SIM card
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: January 20, 2004
    Assignee: Korea Telecom Freetel Co., Ltd.
    Inventors: Byung-Ik Ahn, Chan-Ho Yun, Yuon-Pil Jeung, Kwang-Wuk Lee, Cheol-Hyun Kang, Seong-Jin Choi
  • Publication number: 20030148791
    Abstract: Disclosed is a CDMA terminal for providing a CDMA service to a global system for mobile communications (GSM) service subscriber in a CDMA service area which comprises: a subscriber identity module (SIM) cardholder for installing or uninstalling a SIM card of a GSM service subscriber, wherein when a SIM card of the GSM service subscriber is installed in the SIM cardholder in the CDMA service area, specific data are transmitted using a CDMA message in the case of authenticating the GSM service subscriber using information on the GSM service subscriber stored in the SIM card, and when the authentication of the GSM service subscriber is normally completed, the CDMA terminal is used for the GSM service subscriber as a roaming service terminal in the CDMA service area. According to the present invention, the GSM service subscriber can use his SIM card and number in the CDMA service area.
    Type: Application
    Filed: March 25, 2002
    Publication date: August 7, 2003
    Inventors: Byung-Ik Ahn, Chan-Ho Yun, Yuon-Pil Jeung, Kwang-Wouk Lee, Cheol-Hyun Kang, Seong-Jin Choi
  • Publication number: 20020061745
    Abstract: Disclosed is a roaming service system in a CDMA service area for GSM service subscribers, which comprises a CDMA system comprising a CDMA HLR storing information on subscribers' locations and services, a CDMA MSC connected to the CDMA HLR and accessing calls, and a CDMA terminal wirelessly connected to the CDMA MSC and capable of having a SIM card removably installed therein; a GSM system comprising a GSM HLR storing information on the subscribers' locations and services, a GSM MSC connected to the GSM HLR and accessing calls, an authentication center (AuC) connected to a GSM network and authenticating terminals, and a GSM terminal wirelessly connected to the GSM MSC; and an IRGS connected between the CDMA system and the GSM system and converting signals to execute signal communications between the systems, and when a subscriber of a service provided by the GSM system moves to an area in which the subscriber can use the service provided by the CDMA system and installs the subscriber's SIM card in the CDMA ter
    Type: Application
    Filed: April 16, 2001
    Publication date: May 23, 2002
    Inventors: Byung-Ik Ahn, Chan-Ho Yun, Yuon-Pil Jeung, Kwang-Wuk Lee, Cheol-Hyun Kang, Seong-Jin Choi