Patents by Inventor Youngjea KANG

Youngjea 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).

  • Patent number: 12123046
    Abstract: The purpose of the present invention is to provide a fungus-derived FADGDH that has a direct electron transfer ability. Provided is a fusion protein comprising a fungus-derived FADGDH or a mutant thereof and a cytochrome molecule connected to the N-terminus of the FADGDH or variant thereof.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: October 22, 2024
    Assignees: ULTIZYME INTERNATIONAL LTD., I-SENS, INC.
    Inventors: Koji Sode, Youngjea Kang, Kazushige Mori, Katsuhiro Kojima, Junko Shimazaki
  • Patent number: 11378540
    Abstract: An apparatus for measuring a concentration of an analyte in a bio-sample using an electrochemical bio-sensor, includes a connector with a sample cell in which an oxidation/reduction enzyme and an electron transfer mediator are fixed and a working electrode and an counter electrode are provided; a digital-to-analog converter circuit configured to apply a constant DC voltage to start the oxidation/reduction reaction of the analyte, proceed with an electron transfer reaction, and apply a ?-step ladder-type perturbation potential for fluctuating a potential of the sample cell after applying the constant DC voltage; and a microcontroller configured to control the digital-to-analog converter circuit and directly obtain a concentration value of the analyte from a calibration equation using the ?-step ladder-type perturbation potential.
    Type: Grant
    Filed: May 18, 2020
    Date of Patent: July 5, 2022
    Assignee: I-SENS, INC.
    Inventors: Geun Sig Cha, Hakhyun Nam, Seok-Won Lee, Sung Hyuk Choi, Youngjea Kang, Myeongho Lee, Ho Dong Park, Sung Pil Cho
  • Publication number: 20210267503
    Abstract: The present disclosure relates to a continuous blood glucose measurement body attachment unit, and provides a continuous blood glucose measurement body attachment unit, which is manufactured in an assembled state in an applicator so as to minimize separate additional operations, such that the body attachment unit can be attached to the body with only a simple operation of the applicator and, particularly, the body attachment unit has a wireless communication chip so as to be capable of communicating with an external terminal, thereby enabling simple and convenient usage without an additional operation in which a separate transmitter must be connected and enabling maintenance to be more easily performed, and after the body attachment unit is attached to the body, an operation starts by the control of a user, such that an operation start time point can be adjusted to an appropriate time point according to the needs of the user, and an operation can start in a stabilized state, such that blood glucose can be mor
    Type: Application
    Filed: June 4, 2019
    Publication date: September 2, 2021
    Inventors: Kyung Chul CHAE, Hyun Ho CHOI, Goang Ye! RYU, Ji Hoon WANG, YoungJea KANG
  • Publication number: 20200399671
    Abstract: The purpose of the present invention is to provide a fungus-derived FADGDH that has a direct electron transfer ability. Provided is a fusion protein comprising a fungus-derived FADGDH or a mutant thereof and a cytochrome molecule connected to the N-terminus of the FADGDH or variant thereof.
    Type: Application
    Filed: March 8, 2019
    Publication date: December 24, 2020
    Inventors: Koji SODE, Youngjea KANG, Kazushige MORI, Katsuhiro KOJIMA, Junko SHIMAZAKI
  • Publication number: 20200278314
    Abstract: An apparatus for measuring a concentration of an analyte in a bio-sample using an electrochemical bio-sensor, includes a connector with a sample cell in which an oxidation/reduction enzyme and an electron transfer mediator are fixed and a working electrode and an counter electrode are provided; a digital-to-analog converter circuit configured to apply a constant DC voltage to start the oxidation/reduction reaction of the analyte, proceed with an electron transfer reaction, and apply a ?-step ladder-type perturbation potential for fluctuating a potential of the sample cell after applying the constant DC voltage; and a microcontroller configured to control the digital-to-analog converter circuit and directly obtain a concentration value of the analyte from a calibration equation using the ?-step ladder-type perturbation potential.
    Type: Application
    Filed: May 18, 2020
    Publication date: September 3, 2020
    Inventors: Geun Sig CHA, Hakhyun NAM, Seok-Won LEE, Sung Hyuk CHOI, Youngjea KANG, Myeongho LEE, Ho Dong PARK, Sung Pil CHO
  • Patent number: 10690619
    Abstract: A method for measuring a concentration of an analyte in a bio-sample using an electrochemical bio-sensor according to an exemplary embodiment of the present invention is characterized by a step of obtaining predetermined features from induced currents obtained by applying a DC voltage according to chronoamperometry in which, after a whole blood sample is injected to the electrochemical bio-sensor, a concentration of an analyte is obtained from an induced current obtained by applying a DC voltage for a certain time and from all induced currents obtained by further applying several step-ladder perturbation potentials for a short time subsequent to the DC voltage for the certain time, and is also characterized by minimization of a measurement error caused by a hindering material by forming a calibration equation by combining the at least one feature in a function and optimizing various conditions of the bio-sample through DeletedTextsmultivariable analysis.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: June 23, 2020
    Assignee: I-SENS, INC.
    Inventors: Geun Sig Cha, Hakhyun Nam, Seok-Won Lee, Sung Hyuk Choi, Youngjea Kang, Myeongho Lee, Ho Dong Park, Sung Pil Cho
  • Publication number: 20160077037
    Abstract: A method for measuring a concentration of an analyte in a bio-sample using an electrochemical bio-sensor according to an exemplary embodiment of the present invention is characterized by a step of obtaining predetermined features from induced currents obtained by applying a DC voltage according to chronoamperometry in which, after a whole blood sample is injected to the electrochemical bio-sensor, a concentration of an analyte is obtained from an induced current obtained by applying a DC voltage for a certain time and from all induced currents obtained by further applying several step-ladder perturbation potentials for a short time subsequent to the DC voltage for the certain time, and is also characterized by minimization of a measurement error caused by a hindering material by forming a calibration equation by combining the at least one feature in a function and optimizing various conditions of the bio-sample through Deleted Texts multivariable analysis.
    Type: Application
    Filed: December 8, 2014
    Publication date: March 17, 2016
    Inventors: Geun Sig CHA, Hakhyun NAM, Seok-Won LEE, Sung Hyuk CHOI, Youngjea KANG, Myeongho LEE, Ho Dong PARK, Sung Pil CHO