Patents by Inventor William S. Schaffer

William S. Schaffer 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).

  • Curb slider device for skateboards
    Patent number: 4165090
    Abstract: A skateboard with front and rear slider devices located inside the wheel trucks. The devices form an angle not less than 15.degree. nor more than 45.degree. with the skateboard. One end of each device is attached to the skateboard, the other end is attached to the wheel truck.
    Type: Grant
    Filed: January 31, 1978
    Date of Patent: August 21, 1979
    Inventors: Richard C. Feddersohn, William S. Schaffer