Patents by Inventor Heinz-P. Hornung

Heinz-P. Hornung 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).

  • Device and process for checking sheet articles such as bank notes or securities
    Patent number: 6061121
    Abstract: An apparatus for testing sheet material includes an illumination device which illuminates the sheet material continually and in the total spectral region to be tested, and a receiving device having at least two linear parallel CCD arrays. A filter transmitting a certain spectral region is mounted on each CCD array. The individual filters are selected so that at least one transmits in the visible spectral region and one in the invisible spectral region. For detection of the light diffusely reflected or transmitted by the sheet material, the individual CCD arrays produce electric signals from the received light which are then processed in an evaluation device and compared with reference data for testing the sheet material.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: May 9, 2000
    Assignee: Giesecke & Devrient GmbH
    Inventors: Norbert Holl, Florian Holzner, Heinz-P. Hornung, Bernd Wunderer