Patents by Inventor David R. Papenfuss

David R. Papenfuss 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).

  • SPF/DB structure for attenuation of noise from air flow
    Patent number: 10294815
    Abstract: A propulsion system comprises a turbine engine, and an engine nacelle including an SPF/DB inner wall having a hot side face sheet against the engine and a cold side face sheet that has noise attenuation openings.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: May 21, 2019
    Assignee: The Boeing Company
    Inventors: Max R. Runyan, Daniel G. Sanders, Larry D. Hefti, David R. Papenfuss, Jack W. Mauldin, Luis R. Leon
  • SPF/DB STRUCTURE FOR ATTENUATION OF NOISE FROM AIR FLOW
    Publication number: 20130251510
    Abstract: A propulsion system comprises a turbine engine, and an engine nacelle including an SPF/DB inner wall having a hot side face sheet against the engine and a cold side face sheet that has noise attenuation openings.
    Type: Application
    Filed: March 1, 2012
    Publication date: September 26, 2013
    Applicant: THE BOEING COMPANY
    Inventors: Max R. Runyan, Daniel G. Sanders, Larry D. Hefti, David R. Papenfuss, Jack W. Mauldin, Luis R. Leon