Patents by Inventor Hui-Chin Su

Hui-Chin Su 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).

  • Roller skate
    Patent number: 5671931
    Abstract: A roller skate includes three or more wheels rotatably supported in the lower portion. The front wheel is disengaged from the ground surface when the middle wheel and the rear wheel are in contact with the ground surface, and the rear wheel is disengaged from the ground surface when the middle wheel and the front wheel are in contact with the ground surface. The rear wheel is coupled to the front wheel so as to be driven by the front wheel when the rear wheel is elevated and is not in contact with the ground surface.
    Type: Grant
    Filed: May 21, 1996
    Date of Patent: September 30, 1997
    Inventor: Hui-Chin Su