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Hajime Tazumi

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  • Osaka-shi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Rolling bearing
    • Patent number 6,858,100
    • Issue date Feb 22, 2005
    • Koyo Seiko Co., Ltd.
    • Hisashi Harada
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Manufacturing method of steel ball for rolling bearing
    • Patent number 6,745,472
    • Issue date Jun 8, 2004
    • Koyo Seiko Co., Ltd.
    • Yoshiki Fujita
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Rolling bearing
    • Patent number 6,726,728
    • Issue date Apr 27, 2004
    • Koyo Seiko Co., Ltd.
    • Tsuyoshi Okumura
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Rolling bearing
    • Patent number 6,547,442
    • Issue date Apr 15, 2003
    • Koyo Seiko Co., Ltd.
    • Toshiharu Watanabe
    • C21 - METALLURGY OF IRON
  • Information Patent Grant

    One-way clutch
    • Patent number 6,394,249
    • Issue date May 28, 2002
    • Koyo Seiko Co., Ltd.
    • Hajime Tazumi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    One-way clutch
    • Patent number 6,343,682
    • Issue date Feb 5, 2002
    • Koyo Seiko Co., Ltd.
    • Tadahiro Terada
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    One-way clutch
    • Patent number 6,311,814
    • Issue date Nov 6, 2001
    • Koyo Seiko Co., Ltd.
    • Yoshitaka Nakagawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    One-way clutch and auxiliary machine using the same
    • Patent number 6,138,804
    • Issue date Oct 31, 2000
    • Koyo Seiko Co., Ltd.
    • Hajime Tazumi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pulley unit
    • Patent number 6,116,393
    • Issue date Sep 12, 2000
    • Koyo Seiko Co., Ltd.
    • Junya Ooitsu
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pulley unit
    • Patent number 6,095,301
    • Issue date Aug 1, 2000
    • Koyo Seiko Co., Ltd.
    • Hideki Fujiwara
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Ball bearing cages and ball bearings
    • Patent number 5,539,844
    • Issue date Jul 23, 1996
    • Koyo Seiko Co., Ltd.
    • Hajime Tazumi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    ROLLING, SLIDING PART AND PROCESS FOR PRODUCING SAME
    • Publication number 20080264528
    • Publication date Oct 30, 2008
    • JTEKT Corporation
    • Hisashi HARADA
    • C21 - METALLURGY OF IRON
  • Information Patent Application

    Rolling, sliding part and process for producing the same
    • Publication number 20040234180
    • Publication date Nov 25, 2004
    • Koyo Seiko Co., Ltd.
    • Hisashi Harada
    • C21 - METALLURGY OF IRON
  • Information Patent Application

    Manufacturing method of steel ball for rolling bearing
    • Publication number 20030037439
    • Publication date Feb 27, 2003
    • Yoshiki Fujita
    • B24 - GRINDING POLISHING
  • Information Patent Application

    Rolling bearing
    • Publication number 20030029525
    • Publication date Feb 13, 2003
    • KOYO SEIKO CO., LTD.
    • Hisashi Harada
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Rolling bearing
    • Publication number 20020122611
    • Publication date Sep 5, 2002
    • Tsuyoshi Okumura
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...