Patents by Inventor Satoru Oonakahara

Satoru Oonakahara 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 and read/write control method for controlling data readout/data write-in with respect to data storing means contained in IC card
    Patent number: 5285055
    Abstract: In an IC card of this invention, a plurality of password numbers are previously stored and data can be read out from the IC card and written into the IC card when any one of the plurality of password numbers is input. Further, data readout and write-in with respect to the IC card are partially limited according to the input password number.
    Type: Grant
    Filed: September 11, 1991
    Date of Patent: February 8, 1994
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Satoru Oonakahara, Tadashi Murayama, Shouichi Ooshima