Patents by Inventor Joseph Bigun

Joseph Bigun 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: 5524933
    Abstract: A mark is incorporated to the original during the fabrication of said original in such a way that said mark is invisible on the original but appears on the copy of the original which is made by using a photocopying machinge. The mark is incorporated by additionally mixing the original image to be protected and the marking image to be concealed in the original by modulating one or the other of the images or by manipulation of Fourier transforms.
    Type: Grant
    Filed: January 28, 1994
    Date of Patent: June 11, 1996
    Assignee: Ecole Polytechnique Federale de Lausanne
    Inventors: Murat Kunt, Joseph Bigun, Benoit Duc