Patents by Inventor Larry A. Wandtke

Larry A. Wandtke 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).

  • Fan silencer
    Patent number: 3949830
    Abstract: A fan silencer having an external shell of annular cross section and a cylindrical central core mounted on a rigid frame. The external shell and the inner core each contain noise absorbing insulation, and have easily removable wall sections to allow fast and easy replacement of said insulation and cleaning of said wall sections.
    Type: Grant
    Filed: June 20, 1975
    Date of Patent: April 13, 1976
    Assignee: George Koch Sons, Inc.
    Inventors: James H. Muehlbauer, Larry A. Wandtke