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Tsutomu Hamada

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Patents Grantslast 30 patents

  • Information Patent Grant

    Hydrodynamic bearing device
    • Patent number 7,726,881
    • Issue date Jun 1, 2010
    • Panasonic Corporation
    • Tsutomu Hamada
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Hydrodynamic bearing device and spindle motor that makes use of same
    • Patent number 7,625,123
    • Issue date Dec 1, 2009
    • Panasonic Corporation
    • Katsuo Ishikawa
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Spindle motor
    • Patent number 7,541,708
    • Issue date Jun 2, 2009
    • Panasonic Corporation
    • Katsuo Ishikawa
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Hydrodynamic bearing device
    • Patent number 7,513,689
    • Issue date Apr 7, 2009
    • Panasonic Corporation
    • Tsutomu Hamada
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Hydrodynamic bearing device
    • Patent number 7,186,028
    • Issue date Mar 6, 2007
    • Matsushita Electric Industrial Co., Ltd.
    • Takafumi Asada
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Vertical hydrodynamic bearing apparatus
    • Patent number 5,810,480
    • Issue date Sep 22, 1998
    • Matsushita Electric Industrial Co., Ltd.
    • Takafumi Asada
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    SLEEVE FOR HYDRODYNAMIC BEARING DEVICE, HYDRODYNAMIC BEARING DEVICE...
    • Publication number 20110044837
    • Publication date Feb 24, 2011
    • NIDEC CORPORATION
    • Tsutomu HAMADA
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    HYDRODYNAMIC BEARING DEVICE, SPINDLE MOTOR, AND INFORMATION DEVICE
    • Publication number 20100052447
    • Publication date Mar 4, 2010
    • Yosuke KADOYA
    • G11 - INFORMATION STORAGE
  • Information Patent Application

    HYDRODYNAMIC BEARING DEVICE
    • Publication number 20090154851
    • Publication date Jun 18, 2009
    • Tsutomu Hamada
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    HYDRODYNAMIC BEARING DEVICE
    • Publication number 20090155116
    • Publication date Jun 18, 2009
    • Tsutomu Hamada
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Spindle motor
    • Publication number 20090152968
    • Publication date Jun 18, 2009
    • Panasonic Corporation
    • Katsuo Ishikawa
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    HYDRODYNAMIC BEARING DEVICE, AND SPINDLE MOTOR AND INFORMATION PROC...
    • Publication number 20090073596
    • Publication date Mar 19, 2009
    • Takafumi Asada
    • G11 - INFORMATION STORAGE
  • Information Patent Application

    SLEEVE FOR HYDRODYNAMIC BEARING DEVICE, HYDRODYNAMIC BEARING DEVICE...
    • Publication number 20090060403
    • Publication date Mar 5, 2009
    • Tsutomu Hamada
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Hydrodynamic bearing device and manufacturing method thereof
    • Publication number 20070092171
    • Publication date Apr 26, 2007
    • Takafumi Asada
    • G11 - INFORMATION STORAGE
  • Information Patent Application

    Hydrodynamic bearing device and spindle motor that makes use of same
    • Publication number 20070086686
    • Publication date Apr 19, 2007
    • Katsuo Ishikawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Sleeve for hydrodynamic bearing device, hydrodynamic bearing device...
    • Publication number 20070047857
    • Publication date Mar 1, 2007
    • Tsutomu Hamada
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Spindle motor
    • Publication number 20060158060
    • Publication date Jul 20, 2006
    • Matsushita Electric Industrial Co., Ltd.
    • Katsuo Ishikawa
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    Hydrodynamic bearing device
    • Publication number 20060029313
    • Publication date Feb 9, 2006
    • Tsutomu Hamada
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Fluid dynamic bearing device
    • Publication number 20060008190
    • Publication date Jan 12, 2006
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    • Tsutomu Hamada
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Hydrodynamic bearing device
    • Publication number 20050201645
    • Publication date Sep 15, 2005
    • Matsushita Elec. Ind. Co., Ltd.
    • Takafumi Asada
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Fluid bearing device
    • Publication number 20050169561
    • Publication date Aug 4, 2005
    • Matsushita Electric Industrial Co., Ltd.
    • Takafumi Asada
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...