Patents by Inventor Teruyoshi Nagaoka

Teruyoshi Nagaoka 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).

  • Data processing apparatus for digital copyrights management
    Patent number: 7549172
    Abstract: Data processing apparatus distributes a public key certificate and information about a private key to a user terminal as activation information separately from a terminal module. In the case where the public key certification is vulnerable, it transmits only the activation information again.
    Type: Grant
    Filed: September 20, 2004
    Date of Patent: June 16, 2009
    Assignee: Fujitsu Limited
    Inventors: Takashi Tokutani, Takahisa Hatakeyama, Keishiro Tanaka, Masakazu Yura, Teruyoshi Nagaoka
  • Data processing apparatus for digital copyrights management
    Publication number: 20050185792
    Abstract: Data processing apparatus distributes a public key certificate and information about a private key to a user terminal as activation information separately from a terminal module. In the case where the public key certification is vulnerable, it transmits only the activation information again.
    Type: Application
    Filed: September 20, 2004
    Publication date: August 25, 2005
    Inventors: Takashi Tokutani, Takahisa Hatakeyama, Keishiro Tanaka, Masakazu Yura, Teruyoshi Nagaoka