Patents by Inventor Cherng-Yuh Shen

Cherng-Yuh Shen 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).

  • Hula hoop with rotary balls
    Patent number: 6319086
    Abstract: A hula hoop having a plurality of arc frames joined in end-to-end relationship so as to form a circular configuration. Each of the arc frames has a top arc unit and a bottom arc unit mechanically affixed together. Each of the arc frames has an undulating inner surface. A spherical ball is rotatably mounted within the arc frame so as to have a surface extending outwardly of the inner surface.
    Type: Grant
    Filed: July 24, 2000
    Date of Patent: November 20, 2001
    Inventor: Cherng-Yuh Shen