Patents by Inventor Hidetoshi Kambe

Hidetoshi Kambe 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).

  • Copyright control system
    Patent number: 5818933
    Abstract: A copyright control system for performing access control to copyright digital information. The copyright control system is equipped with an encryption/decryption hardware 11 which accepts encrypted copyright digital information from an option hardware 6 or an FDD unit 3 through a sub-data bus 23. The encryption/decryption hardware 11 decrypts the encrypted digital information using a decryption key obtained from a copyright control center for primary utilization of the encrypted digital information and inputted from an CPU 1.
    Type: Grant
    Filed: July 5, 1996
    Date of Patent: October 6, 1998
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hidetoshi Kambe, Atsuhiro Yamagishi, Makoto Saito