Patents by Inventor Taku Matsuhara

Taku Matsuhara 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).

  • Security system for software
    Patent number: 5155768
    Abstract: A security lock for use with a game machine that displays the content of a game through a video display device. The security lock uses a video game system comprising a means of storage, which stores the game programs as software, that is connected in a flexible manner to the game machine.The means of storage includes a device for reading a security code stored within said means of storage and for comparing this security code to a separate security identical, the game machine will operate as usual. However, if both codes are not identical, the game machine will not operate.
    Type: Grant
    Filed: March 11, 1991
    Date of Patent: October 13, 1992
    Assignee: Sega Enterprises, Ltd.
    Inventor: Taku Matsuhara