Patents by Inventor Douglas W. Halverson

Douglas W. Halverson 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).

  • Asphalt screed
    Patent number: D672790
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: December 18, 2012
    Assignee: Caterpillar Paving Products Inc.
    Inventors: Jason W. Kopacz, Joseph P. Spree, Tobin D. Rasmusson, Tony P. Steinhagen, Joe A. Frerich, Brett W. Engel, Douglas W. Halverson
  • Asphalt screed
    Patent number: D673981
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: January 8, 2013
    Assignee: Caterpillar Paving Products Inc.
    Inventors: Jason W. Kopacz, Joseph P. Spree, Tobin D. Rasmusson, Tony P. Steinhagen, Joe A. Frerich, Brett W. Engel, Douglas W. Halverson