Patents by Inventor Ralph Muehlisen

Ralph Muehlisen 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).

  • Apparatus and method for sonic cleaning of an air filter for wheeled and tracked vehicles
    Publication number: 20080085018
    Abstract: An air filter apparatus and method for a land vehicle is disclosed wherein sound waves are directed onto the filter element of the filter device to dislodge particulate matter without the need to disassemble the air filter device.
    Type: Application
    Filed: October 10, 2006
    Publication date: April 10, 2008
    Inventors: Ronald C. Troxell, Praveen Panickef, Ralph Muehlisen, Roy E. Greenlees, Jason D. Troxell