Patents by Inventor Friedrich E. Hahn

Friedrich E. Hahn 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).

  • Circuit arrangement for adjusting the direct current level of a video signal
    Patent number: 4470066
    Abstract: A charging current source and a discharging current source are alternately connected to an input capacitor. By choosing the current ratios it is possible to switch a reference level located in the signal range, for example the black level in a television signal, in the circuit, without the necessity for interval keying.
    Type: Grant
    Filed: May 3, 1982
    Date of Patent: September 4, 1984
    Assignee: U.S. Philips Corporation
    Inventors: Jorg Wolber, Dieter J. Kunze, Friedrich E. Hahn, Walter Demmer