Patents by Inventor Chih-Hao Yui

Chih-Hao Yui 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).

  • Score ring structure for dart boards
    Publication number: 20020096830
    Abstract: A score structure for a dart board includes a frame with at least three sides and one of the at least three sides is an inward curved side. A body member is received in the frame and the inward curved side urges one of sides of the body member to let the body member be snugly received in the frame.
    Type: Application
    Filed: January 25, 2001
    Publication date: July 25, 2002
    Inventor: Chih-Hao Yui