Patents by Inventor Kazutomo Tani

Kazutomo Tani 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).

  • IC card system
    Patent number: 4816656
    Abstract: An IC card system uses at least one of the RESET, I/O, and CLOCK terminals of an IC card so as to serially and/or parallel input multivalue signals having different levels. The levels of the input signals are detected at a detector or detectors and outputs therefrom are compared at a comparator with specific codes prestored in level matrix of the IC card. If a coincidence between outputs obtained corresponding to the input signals and the specific codes is established, a test program stored in a test program ROM is started.
    Type: Grant
    Filed: June 14, 1988
    Date of Patent: March 28, 1989
    Assignee: Casio Computer Co., Ltd.
    Inventors: Harumi Nakano, Kazutomo Tani