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Yoshimi Shigenaga

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    System for judging propriety of use of an integrated circuit card w...
    • Patent number 4,810,862
    • Issue date Mar 7, 1989
    • Casio Computer Co., Ltd.
    • Harumi Nakano
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    IC card system
    • Patent number 4,809,326
    • Issue date Feb 28, 1989
    • Casio Computer Co., Ltd.
    • Yoshimi Shigenaga
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    IC card system with control of data-writing process
    • Patent number 4,803,351
    • Issue date Feb 7, 1989
    • Casio Computer Co., Ltd.
    • Yoshimi Shigenaga
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    IC card system
    • Patent number 4,794,236
    • Issue date Dec 27, 1988
    • Casio Computer Co., Ltd.
    • Shigeyuki Kawana
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    Customer service system for use in IC card system
    • Patent number 4,752,677
    • Issue date Jun 21, 1988
    • Casio Computer Co., Ltd.
    • Harumi Nakano
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    Intelligent card
    • Patent number 4,749,982
    • Issue date Jun 7, 1988
    • Casio Computer Co., Ltd.
    • Kenji Rikuna
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    IC card system
    • Patent number 4,727,244
    • Issue date Feb 23, 1988
    • Casio Computer Co., Ltd.
    • Harumi Nakano
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    Identification system
    • Patent number 4,710,613
    • Issue date Dec 1, 1987
    • Casio Computer Co., Ltd.
    • Yoshimi Shigenaga
    • G06 - COMPUTING CALCULATING COUNTING