Patents by Inventor William Wrobleski

William Wrobleski 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).

  • Generational copy control of a video signal
    Patent number: 6701062
    Abstract: Method and apparatus for providing generational copy control of a video signal. A digital video signal contains content information, first supplemental information and second supplemental information. The first supplemental information is represented by a watermark pattern, the second by a control pattern. Copying of the content information is only permitted if a predetermined combination of the first and second supplemental information is present. Pseudo-sync pulses are added to a blanking interval of an analog video signal converted from a digital video signal, the pulses representing the second supplemental information.
    Type: Grant
    Filed: June 8, 1999
    Date of Patent: March 2, 2004
    Assignee: Macrovision Corporation
    Inventors: Johan Cornelis Talstra, Mark Hollar, Kordian Kurowski, David Collier, William Wrobleski, James Holzgrafe, Antonius Adrianus Cornelis Maria Kalker, Derek Nelson, Patrice Capitant, John O. Ryan