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Masaaki Kageyama

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  • Iwaki, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Key switch disposed on keyboard input device and method of producin...
    • Patent number 6,597,344
    • Issue date Jul 22, 2003
    • Alps Electric Co., Ltd.
    • Tsuyoshi Narusawa
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Key switch with easily attachable key top
    • Patent number 6,483,050
    • Issue date Nov 19, 2002
    • Alps Electric Co., Ltd.
    • Tsuyoshi Narusawa
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Keyboard apparatus
    • Patent number 6,312,176
    • Issue date Nov 6, 2001
    • Alps Electric Co., Ltd.
    • Masaaki Kageyama
    • 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
  • Information Patent Grant

    Key top
    • Patent number 5,066,842
    • Issue date Nov 19, 1991
    • Alps Electric Co., Ltd.
    • Kazuyoshi Yamagata
    • H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents