Patents by Inventor Hakan Lindstrom

Hakan Lindstrom 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).

  • Boat hull construction
    Patent number: 4000712
    Abstract: A boat comprising a main hull and an additional hull that is attached to the stern of the main hull. The additional hull is adjustable around a transversal axis relative to the main hull and acts as a trim plane. The bottom and sides of the main hull have extensions that overlap the forward part of the additional hull such that there is formed a flat, narrow and backwardly directed space between the extensions and the forward part of the additional hull. Air is sucked down under the additional hull through the space.
    Type: Grant
    Filed: September 23, 1975
    Date of Patent: January 4, 1977
    Inventors: Ernst G. Erikson, K. Hakan Lindstrom