Patents by Inventor Kohji Tanagawa

Kohji Tanagawa 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 cards and information storage circuit therefor
    Patent number: 5034597
    Abstract: An IC card having a self-identification function in the card itself includes an input key for inputting a personal identification number (PIN), a comparator for comparing the PIN input via the input key with a prerecorded PIN. A transaction condition signal is produced when a match is found. An external terminal is provided for outputting to the outside of the card, e.g. a bank terminal, to enable a transaction using of the the card. An information storage circuit suitable for use in the IC card is also disclosed.
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: July 23, 1991
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Shiro Atsumi, Shintaro Kotani, Sadao Watahiki, Kohji Tanagawa