Patents by Inventor Yun Seok Chang

Yun Seok Chang 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: 10292603
    Abstract: A method of measuring blood pressure, including: sensing an atmospheric pressure, an applied pressure, and a blood pressure of a blood vessel delivered to a skin and outputting an electrical signal indicating a result of sensing the pressures; dividing the electrical signal into a divided electrical signal which includes a direct current (DC) signal and an alternating current (AC) signal; processing the divided electrical signal; calculating the applied pressure using the processed electrical signal; and calculating a blood pressure average using the calculated applied pressure and a swing value of the processed electrical signal.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: May 21, 2019
    Assignee: UMEDIX CORPORATION LIMITED
    Inventors: Sung Hun Woo, Yun Young Choi, Yun Seok Chang
  • Publication number: 20180228379
    Abstract: A method of measuring blood pressure, including: sensing an atmospheric pressure, an applied pressure, and a blood pressure of a blood vessel delivered to a skin and outputting an electrical signal indicating a result of sensing the pressures; dividing the electrical signal into a divided electrical signal which includes a direct current (DC) signal and an alternating current (AC) signal; processing the divided electrical signal; calculating the applied pressure using the processed electrical signal; and calculating a blood pressure average using the calculated applied pressure and a swing value of the processed electrical signal.
    Type: Application
    Filed: April 16, 2018
    Publication date: August 16, 2018
    Applicant: UMEDIX CORPORATION LIMITED
    Inventors: Sung Hun WOO, Yun Young CHOI, Yun Seok CHANG
  • Patent number: 9974447
    Abstract: According to an aspect of the present invention, there is provided a blood pressure measuring apparatus including a pressure sensor unit configured to sense an atmospheric pressure, an applied pressure, and a blood pressure of a blood vessel delivered to a skin and output an electrical signal indicating a result of sensing the pressures, while in contact with the skin; a signal division unit configured to receive the electrical signal and divide the electrical signal into a divided electrical signal which includes a direct current (DC) signal and an alternating current (AC) signal; a signal processor unit configured to process the divided electrical signal; and a blood pressure calculation unit configured to calculate the applied pressure using the processed electrical signal and calculate a blood pressure average using the calculated applied pressure and a swing value of the electrical.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: May 22, 2018
    Assignee: UMEDIX CORPORATION LIMITED
    Inventors: Sung Hun Woo, Yun Young Choi, Yun Seok Chang
  • Publication number: 20140364747
    Abstract: According to an aspect of the present invention, there is provided a blood pressure measuring apparatus including a pressure sensor unit configured to sense an atmospheric pressure, an applied pressure, and a blood pressure of a blood vessel delivered to a skin and output an electrical signal indicating a result of sensing the pressures, while in contact with the skin; a signal division unit configured to receive the electrical signal and divide the electrical signal into a divided electrical signal which includes a direct current (DC) signal and an alternating current (AC) signal; a signal processor unit configured to process the divided electrical signal; and a blood pressure calculation unit configured to calculate the applied pressure using the processed electrical signal and calculate a blood pressure average using the calculated applied pressure and a swing value of the electrical.
    Type: Application
    Filed: August 27, 2014
    Publication date: December 11, 2014
    Inventors: Sung Hun WOO, Yun Young CHOI, Yun Seok CHANG
  • Patent number: 6473629
    Abstract: A method of displaying alternating transmitting and receiving phases of voice communication in a mobile phone with a display when it is operated in the speakerphone mode includes the steps of comparing the intensity of a received voice signal from a caller with that of a transmitted voice signal, outputting the received voice signal through the speaker of the mobile phone while displaying a visual indication representing the receiving phase on the display if the intensity of the received voice signal is stronger than that of the transmitted voice signal, and sending the transmitted voice signal to the caller while displaying a visual indication representing the transmitting phase on the display if the intensity of the received voice signal is weaker than that of the transmitted voice signal.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: October 29, 2002
    Assignee: Samsung Electronics, Co., Ltd.
    Inventor: Yun-Seok Chang
  • Patent number: 6177007
    Abstract: Disclosed herein is a high efficiency apparatus for treating nitrogen and phosphorous in sewage. The apparatus includes a sludge denitrification tank supplying sludge to an anaerobic tank.
    Type: Grant
    Filed: October 1, 1998
    Date of Patent: January 23, 2001
    Assignee: Daewoo Corporation
    Inventors: Eui Shin Lee, Yun Seok Chang, Myung Gyun Park, Yong Rok Heo, Chil Lim Park