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Katsuyuki KATAYAMA

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  • Miyagi-ken, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Input device and keyboard device having illumination function
    • Patent number 8,334,794
    • Issue date Dec 18, 2012
    • Alps Electric Co., Ltd.
    • Kazutoshi Watanabe
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    Thin keyboard
    • Patent number 6,087,604
    • Issue date Jul 11, 2000
    • Alps Electric Co., Ltd.
    • Seiichi Suga
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Data entry keyboard
    • Patent number D386488
    • Issue date Nov 18, 1997
    • Alps Electric Co., Ltd.
    • Masaaki Kageyama
    • D14 - Recording, communication, or information retrieval equipment

Patents Applicationslast 30 patents