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XINRAN LI

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  • QINGDAO, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Frequency converter
    • Patent number 11,558,985
    • Issue date Jan 17, 2023
    • CHINA UNIVERSITY OF PETROLEUM BLUE SKY (QINGDAO) PETROLEUM TECHNOLOGY CO., LTD.
    • Kaikai Li
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Frequency converter module
    • Patent number 11,404,994
    • Issue date Aug 2, 2022
    • CHINA UNIVERSITY OF PETROLEUM BLUE SKY(QINGDAO) PETROLEUM TECHNOLOGY CO., LTD
    • Zhihao Wei
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

  • Information Patent Application

    SOLID WASTE TREATMENT METHOD
    • Publication number 20210387885
    • Publication date Dec 16, 2021
    • CHINA UNIVERSITY OF PETROLEUM BLUE SKY (QINGDAO), PETROLEUM TECHNOLOGY CO., LTD.
    • WEIZHONG WEI
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Application

    FREQUENCY CONVERTER MODULE
    • Publication number 20210359636
    • Publication date Nov 18, 2021
    • CHINA UNIVERSITY OF PETROLEUM BLUE SKY(QINGDAO) PETROLEUM TECHNOLOGY CO.,LTD
    • ZHIHAO WEI
    • G01 - MEASURING TESTING
  • Information Patent Application

    FREQUENCY CONVERTER
    • Publication number 20210195809
    • Publication date Jun 24, 2021
    • CHINA UNIVERSITY OF PETROLEUM BLUE SKY(QINGDAO) PETROLEUM TECHNOLOGY CO.,LTD
    • KAIKAI LI
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR