Patents by Inventor Stephen C. Pratt

Stephen C. Pratt 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).

  • Loading and unloading device
    Patent number: 4655671
    Abstract: The invention describes a road trailer which functions in a way similar to a mobile slipway whereby a craft may be moved into and from a body of water along a ramp on a wheeled cradle.
    Type: Grant
    Filed: July 18, 1984
    Date of Patent: April 7, 1987
    Inventor: Stephen C. Pratt