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Yukihisa Tsumori

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Patents Grantslast 30 patents

  • Information Patent Grant

    Machined cage for cylindrical roller bearing and method of manufact...
    • Patent number 7,931,410
    • Issue date Apr 26, 2011
    • NTN CORPORATION
    • Yukihisa Tsumori
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Cylindrical roller bearing
    • Patent number 7,712,966
    • Issue date May 11, 2010
    • NTN Corporation
    • Yukihisa Tsumori
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Conducting rolling bearing
    • Patent number 4,856,916
    • Issue date Aug 15, 1989
    • NTN Toyo Bearing Co., Ltd.
    • Hideji Ito
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Rolling bearing
    • Patent number 4,846,592
    • Issue date Jul 11, 1989
    • NTN Toyo Bearing Co., Ltd.
    • Yukihisa Tsumori
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents