Patents by Inventor Tobias Gra?l

Tobias Gra?l 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).

  • Adaptive line filter
    Patent number: 9013840
    Abstract: A device for improving the filter effect of a filter connected up between an electrical energy source and a source of interference is provided. The filter is configured to feed back interference transients from ground to an input of the source of interference generating the interference transients. The device includes a measuring device for determining a leakage current flowing through the filter and a final control element configured to modify a limit frequency of the filter such that the leakage current through the filter is damped to below a predefined level if the measuring device detects the leakage current.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: April 21, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventors: Walter Beyerlein, Andre Gebhardt, Tobias Graβl, Thomas Weidinger