Patents by Inventor Jurgen G. Hannemann

Jurgen G. Hannemann 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).

  • Apparatus for scanning a disc, and suction device for holding a disc flat during scanning
    Patent number: 5150353
    Abstract: Device for holding an optically readable disc in a flat position during playing has concentric annular depressions to which vacuum is supplied by a passage to a rotatably journalled connection having an airtight lead-through.
    Type: Grant
    Filed: September 11, 1991
    Date of Patent: September 22, 1992
    Assignee: Philips and Du Pont Optical Company
    Inventors: Thomas M. Schnorr, Jurgen G. Hannemann