Patents by Inventor David Willke

David Willke 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).

  • Expansion joint fire barrier for walls
    Patent number: 6192641
    Abstract: Methods and apparatus for installing a fire rated insulation material to span an expansion joint between walls by hollowing out a portion of at least one wall adjacent to the joint to form at least one pocket, and installing the insulation material so that it spans the joint and can slide in and out of the at least one pocket.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: February 27, 2001
    Inventors: David Andraso, David Willke