Patents by Inventor Chang Ping-chuan

Chang Ping-chuan 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).

  • Patent number: 4846743
    Abstract: The invention is to provide a kind of skiing shoes especially referring to a kind of water skiing buoyant shoes. The distinctive features are on a pair of skiing shoe base members buoyant on water surface, we can walk freely and it becomes an additional updated, unique, novel and excitative recreation of water activities. Besides, the invention can be converted to have the function of a sailboat for the pleasure of sailing. The advantages of the invention are high safety, easy to be assemblied, convenient to walk on water surface and buoyancy to be free from sinking. We can enjoy not only the pleasure of water activity but the sceneries around as well as underwater.
    Type: Grant
    Filed: November 6, 1987
    Date of Patent: July 11, 1989
    Inventor: Chang Ping-chuan