Patents by Inventor Nobuo Yoshikawa

Nobuo Yoshikawa 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).

  • Method of and apparatus for granting electronic signature, and computer program
    Publication number: 20050061871
    Abstract: An apparatus for granting electronic signature to a data includes an identification-data acquiring unit that acquires identification data for identifying an owner of a secret key that is used to create the electronic signature, an authorization-data acquiring unit that acquires authorization data corresponding to the identification data acquired, and a signature-granting determining unit that determines whether to grant the electronic signature to the data based on the authorization data acquired.
    Type: Application
    Filed: May 12, 2004
    Publication date: March 24, 2005
    Applicant: Fujitsu Limited
    Inventors: Nobuo Yoshikawa, Seigo Kotani, Takayuki Katou, Nao Ando