Patents by Inventor Hugo Spahn

Hugo Spahn 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).

  • Structural laminate with expanded wood core
    Patent number: 4428993
    Abstract: A structural sandwich laminate constituted by thin skins, such as aluminum or fiber-reinforced plastic sheets bonded to the faces of a core formed by an array of wood strips having a periodic wave formation. The wavy strips in the array are out of phase with each other and are bonded together at their contiguous troughs and peaks to define an open-celled expanded wood structure whereby the laminate, though light-weight, has high strength.
    Type: Grant
    Filed: May 11, 1982
    Date of Patent: January 31, 1984
    Assignee: Baltek Corporation
    Inventors: Henri A. Kohn, Hugo Spahn