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Wenfei Yu

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  • Hangzhou, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

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    • Patent number 10,716,962
    • Issue date Jul 21, 2020
    • Shaochun Chen
    • A62 - LIFE-SAVING FIRE-FIGHTING

Patents Applicationslast 30 patents

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    • Publication number 20190022435
    • Publication date Jan 24, 2019
    • Shaochun Chen
    • A62 - LIFE-SAVING FIRE-FIGHTING