Patents by Inventor Ernst Stöttinger

Ernst Stöttinger 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).

  • Magnet system of a sound transducer
    Patent number: 7151840
    Abstract: A miniaturized electro-dynamic sound transducer has a housing made of deep drawn sheet metal. A magnet system with a magnet is arranged in the housing. A diaphragm provided with a coil is arranged in the housing, and wires extend from the coil to contacts. The housing has an outer diameter of maximally 20 mm. The thin sheet metal of the housing has an average thickness of maximally 0.2 mm. The magnet system has a lower pole piece and an upper pole piece, wherein the pole upper and lower pieces are made of sheet steel having a thickness of at least 1.5 times an average thickness of the bottom of the housing.
    Type: Grant
    Filed: March 16, 2004
    Date of Patent: December 19, 2006
    Assignee: AKG Acoustics GmbH
    Inventors: Hugo Lenhard-Backhaus, Ernst Stöttinger