Patents by Inventor John R. ANDRESEN

John R. ANDRESEN 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).

  • FILTER PROVIDING COARSE MEDIA WITH HIGH-EFFICIENCY INSERT
    Publication number: 20160121243
    Abstract: A filter providing dual paths through a coarse filter medium and a fine filter medium attaches the coarse filter medium to the fine filter medium directly eliminating an intervening supporting structure and simplifying manufacture.
    Type: Application
    Filed: April 10, 2014
    Publication date: May 5, 2016
    Inventors: Eugene W. ALTWIES, John R. ANDRESEN