Patents by Inventor Yoshihiro Shona

Yoshihiro Shona 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).

  • Secure IC card system with reusable prototype IC card
    Patent number: 5442165
    Abstract: An IC card system uses a prototype IC card and one or more production IC cards. The prototype card is programmed to execute standard read/write commands, and an initialize command that returns the card to an initial state. The prototype IC card, which can be issued, initialized, and reissued repeatedly, is used for testing purposes during the development of system software. Production IC cards are programmed to execute the standard read/write commands, and a version read command that reads out a version number distinguishing a production IC card from the prototype IC card. Production IC cards are not programmed to execute the initialize command.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: August 15, 1995
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Shiro Atsumi, Toshinari Kondo, Yoshihiro Shona