Patents by Inventor Joerg Graf

Joerg Graf 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).

  • SOUND-ABSORBING SHIELDING ELEMENT
    Publication number: 20120279799
    Abstract: A sound-absorbing shielding element, in particular for fitting into a motor vehicle, comprises a layered construction which has a support plate, an acoustically effective porous absorber layer and at least one acoustically effective first microperforated sheet which is arranged on a first side of the absorber layer. An acoustically effective second microperforated sheet is arranged on the first side of the absorber layer.
    Type: Application
    Filed: November 4, 2011
    Publication date: November 8, 2012
    Applicant: PROGRESS-WERK OBERKIRCH AG
    Inventor: Joerg Graf