TREA

Takeshi Hiraoka

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  • Saitama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Camshaft
    • Patent number 5,044,224
    • Issue date Sep 3, 1991
    • Nippon Piston Ring Co., Ltd.
    • Takeshi Hiraoka
    • B22 - CASTING POWDER METALLURGY
  • Information Patent Grant

    Camshaft
    • Patent number 5,009,123
    • Issue date Apr 23, 1991
    • Nippon Piston Ring Co. Ltd.
    • Takeshi Hiraoka
    • B22 - CASTING POWDER METALLURGY
  • Information Patent Grant

    Assembled camshaft
    • Patent number 4,998,955
    • Issue date Mar 12, 1991
    • Nippon Piston Ring Co., Ltd.
    • Takeshi Hiraoka
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Method of making camshaft
    • Patent number 4,969,262
    • Issue date Nov 13, 1990
    • Nippon Piston Ring Co., Ltd.
    • Takeshi Hiraoka
    • B22 - CASTING POWDER METALLURGY
  • Information Patent Grant

    Wear-resistant member for use in internal combustion engine and met...
    • Patent number 4,632,074
    • Issue date Dec 30, 1986
    • Nippon Piston Ring Co.
    • Kentaro Takahashi
    • B22 - CASTING POWDER METALLURGY
  • Information Patent Grant

    Wear-resistant member for use in an internal combustion engine
    • Patent number 4,583,502
    • Issue date Apr 22, 1986
    • Nippon Piston Ring Co., Ltd.
    • Kentaro Takahashi
    • B22 - CASTING POWDER METALLURGY
  • Information Patent Grant

    Wear resistant ferro-based sintered alloy
    • Patent number 4,526,617
    • Issue date Jul 2, 1985
    • Nippon Piston Ring Co., Ltd.
    • Takeshi Hiraoka
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Steel floating seal with remelted deposit-alloyed wear surfaces
    • Patent number 4,513,977
    • Issue date Apr 30, 1985
    • Nippon Piston Ring Co., Ltd.
    • Genkichi Umeha
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Cylinder liner
    • Patent number 4,467,169
    • Issue date Aug 21, 1984
    • Nippon Piston Ring Co., Ltd.
    • Takeshi Hiraoka
    • C21 - METALLURGY OF IRON
  • Information Patent Grant

    Cylinder liner
    • Patent number 4,447,275
    • Issue date May 8, 1984
    • Nippon Piston Ring Co., Ltd.
    • Takeshi Hiraoka
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • 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...
  • Information Patent Grant

    Abrasion resistant ferro-based sintered alloy
    • Patent number 4,363,662
    • Issue date Dec 14, 1982
    • Nippon Piston Ring Co., Ltd.
    • Kentaro Takahashi
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Abrasion resistant ferro-based sintered alloy
    • Patent number 4,348,232
    • Issue date Sep 7, 1982
    • Nippon Piston Ring Co., Ltd.
    • Takeshi Hiraoka
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...