Patents by Inventor Young-Nam Na

Young-Nam Na 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).

  • Method for estimating target range error and sonar system thereof
    Patent number: 8270252
    Abstract: Disclosed is an active sonar system capable of estimating a direction and a range of a target by using a sound pulse. A target range error can be estimated by the active sonar system, by applying a principle that a sound pulse used to detect an underwater target with consideration of a vertical structure of a sound velocity in water is reflected and refracted through a multipath not a linear path.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: September 18, 2012
    Assignee: Agency for Defense Development
    Inventors: Joung-Soo Park, Young-Nam Na, Young-Gyu Kim
  • METHOD FOR ESTIMATING TARGET RANGE ERROR AND SONAR SYSTEM THEREOF
    Publication number: 20110096630
    Abstract: Disclosed is an active sonar system capable of estimating a direction and a range of a target by using a sound pulse. A target range error can be estimated by the active sonar system, by applying a principle that a sound pulse used to detect an underwater target with consideration of a vertical structure of a sound velocity in water is reflected and refracted through a multipath not a linear path.
    Type: Application
    Filed: February 17, 2010
    Publication date: April 28, 2011
    Applicant: AGENCY FOR DEFENSE DEVELOPMENT
    Inventors: Joung-Soo Park, Young-Nam Na, Young-Gyu Kim