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Yongtie Yan

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  • Saitama-ken, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Piston ring for internal combustion engine
    • Patent number 9,920,836
    • Issue date Mar 20, 2018
    • KABUSHIKI KAISHA RIKEN
    • Hayato Sasaki
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Gas-detecting element and gas-detecting device comprising same
    • Patent number 6,787,014
    • Issue date Sep 7, 2004
    • Kabushiki Kaisha Riken
    • Masaharu Hasei
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Gas sensing and oxygen pumping device, and apparatus using the same
    • Patent number 6,673,223
    • Issue date Jan 6, 2004
    • Kabushiki Kaisha Riken
    • Akira Kunimoto
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Measuring NOx concentration
    • Patent number 6,551,497
    • Issue date Apr 22, 2003
    • Kabushiki Kaisha Riken
    • Yunzhi Gao
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Nitrogen oxide gas sensor
    • Patent number 6,413,397
    • Issue date Jul 2, 2002
    • Kabushiki Kaisha Riken
    • Masaharu Hasei
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Nitrogen oxide sensor
    • Patent number 6,319,377
    • Issue date Nov 20, 2001
    • Kabushiki Kaisha Riken
    • Masaharu Hasei
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Gas sensor
    • Patent number 6,303,011
    • Issue date Oct 16, 2001
    • Kabushiki Kaisha Riken
    • Yunzhi Gao
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Nitrogen oxide gas sensor
    • Patent number 6,274,016
    • Issue date Aug 14, 2001
    • Kabushiki Kaisha Riken
    • Masaharu Hasei
    • G01 - MEASURING TESTING
  • Information Patent Grant

    NOx sensor
    • Patent number 6,126,902
    • Issue date Oct 3, 2000
    • Kabushiki Kaisha Riken
    • Akira Kunimoto
    • G01 - MEASURING TESTING

Patents Applicationslast 30 patents