Patents Assigned to Hatachi Maxell, Ltd.
  • Method for rewriting partial program data in an IC card and apparatus therefor
    Patent number: 5276903
    Abstract: A method and apparatus for storing and rewriting programs in an IC card. The system provides for storing programs in subdivided portions identified by attribute information including a program number, size and address. The system enables the rewriting of constituent elements of programs without the need for rewriting larger portions. The information identifying the programs parts is stored in an attribute information table in which said sub-area discrimination information and said management information are stored in combination.
    Type: Grant
    Filed: January 19, 1993
    Date of Patent: January 4, 1994
    Assignee: Hatachi Maxell, Ltd.
    Inventor: Toru Shinagawa