Patents by Inventor David R. Karroll

David R. Karroll 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).

  • Roof truss
    Patent number: 7814722
    Abstract: A prefabricated roof truss which includes a bottom plate which attaches to the bottom chord of the roof truss in such a way that the bottom plate does not lift away from the top plate of an interior wall despite the vertical movement of the bottom chord of the roof truss.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: October 19, 2010
    Inventors: Larry Perrault, David R. Karroll