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Masamichi Hayakawa

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  • Simosuwa-machi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Dynamic pressure bearing apparatus
    • Patent number 6,402,385
    • Issue date Jun 11, 2002
    • Sankyo Seiki Mfg. Co., Ltd.
    • Masamichi Hayakawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Fluid sealing device for use with a motor for rotating a disc drive
    • Patent number 6,302,586
    • Issue date Oct 16, 2001
    • Sankyo Seiki Mfg. Co., Ltd.
    • Masamichi Hayakawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Hydrodynamic bearing apparatus
    • Patent number 6,296,391
    • Issue date Oct 2, 2001
    • Sankyo Seiki Mfg. Co., Ltd.
    • Masamichi Hayakawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Dynamic pressure bearing device and method for manufacturing same
    • Patent number 6,244,749
    • Issue date Jun 12, 2001
    • Kabushiki Kaisha Sankyo Seiki Sesakusho
    • Hisaya Nakagawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Dynamic-pressure fluid bearing
    • Patent number 6,155,721
    • Issue date Dec 5, 2000
    • Sankyo Seiki Mfg. Co., Ltd.
    • Hironori Kurosawa
    • G02 - OPTICS
  • Information Patent Grant

    Gas dynamic pressure bearing apparatus
    • Patent number 6,147,424
    • Issue date Nov 14, 2000
    • Sankyo Seiki Mfg. Co., Ltd.
    • Masato Gomyo
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Sealing device for use in a motor
    • Patent number 5,828,795
    • Issue date Oct 27, 1998
    • Sankyo Seiki Mfg. Co., Ltd.
    • Toshihiko Miyakoshi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Hydrodynamic bearing apparatus
    • Patent number 5,806,987
    • Issue date Sep 15, 1998
    • Sankyo Seiki Mfg. Co., Ltd.
    • Tamotsu Nose
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Hydrodynamic bearing apparatus
    • Patent number 5,791,785
    • Issue date Aug 11, 1998
    • Sankyo Seiki Mfg. Co., Ltd.
    • Tamotsu Nose
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Motor having dynamic pressure bearing device
    • Patent number 5,789,836
    • Issue date Aug 4, 1998
    • Sankyo Seiko Mfg. Co., Ltd.
    • Masamichi Hayakawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Hydrodynamic bearing apparatus and method for manufacturing same
    • Patent number 5,743,656
    • Issue date Apr 28, 1998
    • Sankyo Seiki Mfg. Co. Ltd.
    • Masato Gomyo
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Lubricating fluid composition for dynamic pressure bearing
    • Patent number 5,629,274
    • Issue date May 13, 1997
    • Sankyo Seiki Mfg. Co., Ltd.
    • Masamichi Hayakawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Fluid bearing unit and manufactured method thereof
    • Patent number 5,628,569
    • Issue date May 13, 1997
    • Kabushiki Kaisha Sankyo Seiki Seisakusho
    • Masamichi Hayakawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Lubricating fluid composition for dynamic pressure bearing
    • Patent number 5,627,147
    • Issue date May 6, 1997
    • Sankyo Seiki Mfg. Co., Ltd.
    • Masamichi Hayakawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Polyarylene sulfide resin composition and optical pick-up parts for...
    • Patent number 5,599,864
    • Issue date Feb 4, 1997
    • Kabushiki Kaisha Sankyo Seiki Seisakusho
    • Shogo Ogawa
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...