Patents by Inventor Sun-Kyum Kim

Sun-Kyum Kim 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: 20040209715
    Abstract: The present invention relates to a racket being improved elastic and repellent force including an elliptical head frame, a net unit installed along the inner surface of the head frame, a neck unit formed in the long axis direction of the head frame, a handle unit extended from the neck unit, and oblique grooves being consecutively formed along the \outer circumference of the head frame so that strings extended from the net unit can be wound on the head frame. Because the tension is improved in string, the strings crossing each other in the net unit can maintain a predetermined interval to improve the elastic and repellent force, and users can enjoy ball games without correcting the strings.
    Type: Application
    Filed: March 29, 2004
    Publication date: October 21, 2004
    Inventor: Sun-Kyum Kim