TREA

Toru Kumagai

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  • Chiba-shi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Oil injecting apparatus
    • Patent number 7,191,806
    • Issue date Mar 20, 2007
    • Seiko Instruments Inc.
    • Ryoji Yoneyama
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Hydraulic bearing motor
    • Patent number 6,575,633
    • Issue date Jun 10, 2003
    • Seiko Instruments Inc.
    • Hiromitsu Goto
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Hydraulic dynamic pressure bearing motor
    • Patent number 6,552,456
    • Issue date Apr 22, 2003
    • Seiko Instruments Inc.
    • Hiromitsu Goto
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic disc drive device
    • Patent number 5,633,769
    • Issue date May 27, 1997
    • Kabushiki Kaisha Sankyo Seiki Seisakusho
    • Shinji Kinoshita
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Spindle motor
    • Patent number 5,572,078
    • Issue date Nov 5, 1996
    • Sankyo Seiki Mfg. Co., Ltd.
    • Masayoshi Saichi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Magnetic disk drive device having lead wire holding structure
    • Patent number 5,572,384
    • Issue date Nov 5, 1996
    • Kabushiki Kaisha Sankyo Seiki Seisakusho
    • Toru Kumagai
    • G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

  • Information Patent Application

    Oil injecting apparatus
    • Publication number 20050173196
    • Publication date Aug 11, 2005
    • Ryoji Yoneyama
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Spindle motor
    • Publication number 20020096962
    • Publication date Jul 25, 2002
    • Ryoji Yoneyama
    • G11 - INFORMATION STORAGE
  • Information Patent Application

    Hydraulic dynamic pressure bearing motor
    • Publication number 20020093261
    • Publication date Jul 18, 2002
    • Hiromitsu Goto
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Hydraulic bearing motor
    • Publication number 20020081045
    • Publication date Jun 27, 2002
    • Hiromitsu Goto
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...