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Osamu Kawamura

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  • Urawa, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Sintered Fe alloy for valve seat
    • Patent number 5,895,517
    • Issue date Apr 20, 1999
    • Nippon Piston Ring Co., Ltd.
    • Osamu Kawamura
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Joined type valve seat
    • Patent number 5,803,037
    • Issue date Sep 8, 1998
    • Nippon Piston Ring Co., Ltd.
    • Osamu Kawamura
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Method of manufacturing a camshaft
    • Patent number 5,778,530
    • Issue date Jul 14, 1998
    • Nippon Piston Ring Company, Ltd.
    • Yoshikatsu Nakamura
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Camshaft
    • Patent number 5,542,990
    • Issue date Aug 6, 1996
    • Nippon Piston Ring Co., Ltd.
    • Yoshikatsu Nakamura
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Valve seat made of secondary hardening-type high temperature wear-r...
    • Patent number 5,466,276
    • Issue date Nov 14, 1995
    • Honda Giken Kogyo Kabushiki Kaisha
    • Katsuaki Sato
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Synchronizer ring
    • Patent number 5,370,725
    • Issue date Dec 6, 1994
    • Nippon Piston Ring Co., Ltd.
    • Osamu Kawamura
    • B22 - CASTING POWDER METALLURGY
  • Information Patent Grant

    Synchronizer ring
    • Patent number 5,337,872
    • Issue date Aug 16, 1994
    • Nippon Piston Ring Co., Ltd.
    • Osamu Kawamura
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Secondary hardening type high temperature wear-resistant sintered a...
    • Patent number 5,273,570
    • Issue date Dec 28, 1993
    • Honda Giken Kogyo Kabushiki Kaisha
    • Katsuaki Sato
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Synchronizer ring
    • Patent number 5,249,661
    • Issue date Oct 5, 1993
    • Nippon Piston Ring Co., Ltd.
    • Osamu Kawamura
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Rocker arm and method of casting
    • Patent number 5,195,473
    • Issue date Mar 23, 1993
    • Nissan Motor Company, Ltd.
    • Makoto Kano
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    High strength high chromium cast iron and valve rocker arm made the...
    • Patent number 5,096,515
    • Issue date Mar 17, 1992
    • Nippon Piston Ring Co., Ltd.
    • Osamu Kawamura
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Rocker arm having wear resistant scuffing resistant portion
    • Patent number 4,870,931
    • Issue date Oct 3, 1989
    • Nippon Piston Ring Co., Ltd.
    • Yoshikatsu Nakamura
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Sliding member for use in an internal combustion engine
    • Patent number 4,409,294
    • Issue date Oct 11, 1983
    • Nippon Piston Ring Co., Ltd.
    • Takeshi Hiraoka
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...