Patents by Inventor Friedhelm Ehrhardt

Friedhelm Ehrhardt 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).

  • Patent number: 6052569
    Abstract: A radio receiver includes a first tuner circuit (1) for receiving radio signals of a first and a second frequency range, and a second tuner circuit (2) for receiving radio signals of a third frequency range. The second tuner circuit (2) is also used for receiving the first frequency range and works independently of the first tuner circuit (1), in that the second tuner circuit (2) includes a first mixer circuit (35, 36, 37) which converts the radio signals of the third frequency range to the second frequency range, and a first integrated circuit element (5) which alternatively converts radio signals of the first frequency range to a first intermediate frequency, or the radio signals of the third frequency range converted to the second frequency range by the first mixer circuit (35, 36, 37) to a second intermediate frequency. The second tuner circuit (2) may derive coded information, more particularly, traffic information from the radio signals of the first frequency range.
    Type: Grant
    Filed: January 8, 1998
    Date of Patent: April 18, 2000
    Assignee: U.S. Philips Corporation
    Inventor: Friedhelm Ehrhardt