Patents by Inventor Ikuko Sakudo

Ikuko Sakudo 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).

  • Copy generation management method, information signal reproducing method, information signal reproducing apparatus, and information signal recording apparatus
    Patent number: 6571220
    Abstract: A reproducing and/or recording system in which copy generation of an information signal is controlled through the use of copy control information that is added to the information signal. The copy control information takes on at least one of three possible states, a one-copy allowed state, a more-copy prohibited state and a copy absolutely prohibited state. The system determines an initial copy control state for the signal being reproduced and determines the state of copy control information to be added to the reproduced signal based on at least the initial copy control information. During recording it may be determined that no further copy control information is to be added to the signal.
    Type: Grant
    Filed: June 8, 1999
    Date of Patent: May 27, 2003
    Assignee: Sony Corporation
    Inventors: Akira Ogino, Ikuko Sakudo, Takashi Yamanishi