TREA

Makoto Kajiwara

Follow

Person

  • Saitama-shi, JP
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Combined oil ring
    • Patent number 11,873,780
    • Issue date Jan 16, 2024
    • Nippon Piston Ring Co., Ltd.
    • Masahiro Uchiumi
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Piston ring
    • Patent number 11,739,840
    • Issue date Aug 29, 2023
    • Nippon Piston Ring Co., Ltd.
    • Kyoichi Ikeya
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Multi-piece oil ring
    • Patent number 10,330,198
    • Issue date Jun 25, 2019
    • Nippon Piston Ring Co., Ltd.
    • Atsushi Chiba
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Multi-piece oil ring
    • Patent number 10,030,772
    • Issue date Jul 24, 2018
    • Nippon Piston Ring Co., Ltd.
    • Atsushi Chiba
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Piston ring
    • Patent number 9,506,138
    • Issue date Nov 29, 2016
    • Nippon Piston Ring Co., Ltd.
    • Hiroyuki Sugiura
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Piston ring
    • Patent number 9,464,717
    • Issue date Oct 11, 2016
    • NIPPON PISTON RING CO., LTD.
    • Michihiro Ito
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Internal combustion engine oil ring
    • Patent number 8,820,750
    • Issue date Sep 2, 2014
    • Nippon Piston Ring Co., Ltd.
    • Atsushi Chiba
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Combination of piston and piston ring
    • Patent number 7,024,982
    • Issue date Apr 11, 2006
    • Nippon Piston Ring Co., Ltd.
    • Takeshi Aizawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    COMBINED OIL RING
    • Publication number 20220090558
    • Publication date Mar 24, 2022
    • NIPPON PISTON RING CO., LTD
    • Masahiro UCHIUMI
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Application

    PISTON RING
    • Publication number 20220003316
    • Publication date Jan 6, 2022
    • NIPPON PISTON RING CO., LTD
    • Kyoichi IKEYA
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    MULTI-PIECE OIL RING
    • Publication number 20180363778
    • Publication date Dec 20, 2018
    • Nippon Piston Ring Co., Ltd.
    • Atsushi Chiba
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    PISTON RING
    • Publication number 20150225836
    • Publication date Aug 13, 2015
    • Nippon Piston Ring Co., Ltd.
    • Hiroyuki SUGIURA
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Application

    PISTON RING
    • Publication number 20130328274
    • Publication date Dec 12, 2013
    • NIPPON PISTON RING CO., LTD
    • Hiroyuki Sugiura
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Application

    INTERNAL COMBUSTION ENGINE OIL RING
    • Publication number 20130181410
    • Publication date Jul 18, 2013
    • NIPPON PISTON RING CO., LTD.
    • Atsushi Chiba
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    PISTON RING
    • Publication number 20130043659
    • Publication date Feb 21, 2013
    • Nippon Piston Ring Co., Ltd.
    • Michihiro Ito
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    MULTI-PIECE OIL RING
    • Publication number 20120261886
    • Publication date Oct 18, 2012
    • NIPPON PISTON RING CO., LTD.
    • Atsushi Chiba
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Combination of piston and piston ring
    • Publication number 20040040436
    • Publication date Mar 4, 2004
    • Nippon Piston Ring Co., Ltd.
    • Takeshi Aizawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...