TREA

Hiroshi Maruyama

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Sliding member and piston ring
    • Patent number 11,168,790
    • Issue date Nov 9, 2021
    • Kabushiki Kaisha Riken
    • Kazuya Kameda
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Grant

    Sliding member and piston ring
    • Patent number 10,670,147
    • Issue date Jun 2, 2020
    • KABUSHIKI KAISHA RIKEN
    • Kazuya Kameda
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Grant

    Process for producing 2-hydroxyquinoxaline derivatives
    • Patent number 5,169,955
    • Issue date Dec 8, 1992
    • Nippon Kayaku Kabushiki Kaisha
    • Hisabumi Kobayashi
    • C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

  • Information Patent Application

    SLIDING MEMBER AND PISTON RING
    • Publication number 20200284346
    • Publication date Sep 10, 2020
    • Kabushiki Kaisha Riken
    • Kazuya KAMEDA
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    SLIDING MEMBER AND PISTON RING
    • Publication number 20200056700
    • Publication date Feb 20, 2020
    • Kabushiki Kaisha Riken
    • Kazuya KAMEDA
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...