Patents by Inventor Hyun-Ah Kwon

Hyun-Ah Kwon 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).

  • Patent number: 9689785
    Abstract: Disclosed is a metal oxide semiconductor gas sensor having a nanostructure, the metal oxide semiconductor gas sensor including: a substrate; a first electrode formed on the substrate; a gas sensing layer provided on the first electrode, made of a metal oxide semiconductor which has a nanostructure and of which electrical conductivity changes when the metal oxide semiconductor reacts with gas to be sensed, and formed by oblique angle deposition; a second electrode formed on the metal oxide semiconductor; and a control unit for measuring the electrical conductivity of the gas sensing layer to sense the gas by applying a predetermined amount of current through the first and the second electrodes.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: June 27, 2017
    Assignee: POSTECH ACADEMY-INDUSTRY FOUNDATION
    Inventors: Jong Kyu Kim, Hyun Ah Kwon, Sun Yong Hwang
  • Publication number: 20150137836
    Abstract: Disclosed is a metal oxide semiconductor gas sensor having a nanostructure, the metal oxide semiconductor gas sensor including: a substrate; a first electrode formed on the substrate; a gas sensing layer provided on the first electrode, made of a metal oxide semiconductor which has a nanostructure and of which electrical conductivity changes when the metal oxide semiconductor reacts with gas to be sensed, and formed by oblique angle deposition; a second electrode formed on the metal oxide semiconductor; and a control unit for measuring the electrical conductivity of the gas sensing layer to sense the gas by applying a predetermined amount of current through the first and the second electrodes.
    Type: Application
    Filed: June 18, 2012
    Publication date: May 21, 2015
    Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATION
    Inventors: Jong Kyu Kim, Hyun Ah Kwon, Sun Yong Hwang
  • Patent number: 6687502
    Abstract: A method for managing states of a pair of channel elements including a normal channel element for a normal traffic region and an extended channel element for an extended traffic region in an extended traffic region base station that includes a state management block (SMB), a call processing block (CPB), a resource allocation block (RAB), a statistics processing block (SPB) and a base station manager (BSM), includes the steps of: by each of the normal channel element and the extended channel element, reporting current states of each of the normal channel element and the extended channel element to the SMB, wherein the current state is one of an abnormal state, a loading state, an idle state and a busy state; by the SMB, combining the current states to thereby generate a combined state; and by the SMB, reporting the combined state to a set of the CPB and the RAB and a set of the SPB and the BSM.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: February 3, 2004
    Assignee: Hyundai Electronics Industries
    Inventors: Sung-Won Oh, Hyun-Ah Kwon
  • Patent number: 6584086
    Abstract: Information on forward power is indicated in the erasure indicator bit of reverse traffic channel frame. A control station searches for the erasure indicator bit of reverse traffic channel frame transmitted from the a mobile, to judge if forward power control is required. The power is controlled according to a transmission rate previously stored when it is judged that the forward power control is required. The control station searches for the erasure indicator bit of reverse traffic channel frame again after the power control and varies the transmission rate according to the information on forward power, carrying out optimum forward power control.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: June 24, 2003
    Assignee: Hyundai Electronics Ind. Co. Ltd.
    Inventors: Sung-Goo Shim, Tai-Hoon Kim, Hyun-Ah Kwon
  • Publication number: 20010024954
    Abstract: A method for managing states of a pair of channel elements including a normal channel element for a normal traffic region and an extended channel element for an extended traffic region in an extended traffic region base station that includes a state management block (SMB), a call processing block (CPB), a resource allocation block (RAB), a statistics processing block (SPB) and a base station manager (BSM), includes the steps of: by each of the normal channel element and the extended channel element, reporting current states of each of the normal channel element and the extended channel element to the SMB, wherein the current state is one of an abnormal state, a loading state, an idle state and a busy state; by the SMB, combining the current states to thereby generate a combined state; and by the SMB, reporting the combined state to a set of the CPB and the RAB and a set of the SPB and the BSM.
    Type: Application
    Filed: March 21, 2001
    Publication date: September 27, 2001
    Applicant: HYUNDAI ELECTRONICS INDUSTRIES CO., LTD..
    Inventors: Sung-Won Oh, Hyun-Ah Kwon