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Lei SHI

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  • Baoding, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Fire damper
    • Patent number D1080867
    • Issue date Jun 24, 2025
    • Baoding Maizhuo Medical Equipment Co., Ltd.
    • Baozhu Shi
    • D24 - Medical and laboratory equipment
  • Information Patent Grant

    Magnet-driven fire damper for oxygenerator
    • Patent number 12,320,442
    • Issue date Jun 3, 2025
    • LONGFIAN SCITECH CO., LTD.
    • Baozhu Shi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    MAGNET-DRIVEN FIRE DAMPER FOR OXYGENERATOR
    • Publication number 20250003520
    • Publication date Jan 2, 2025
    • LONGFIAN SCITECH CO., LTD.
    • Baozhu SHI
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...