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Zhanqiang Li

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  • Guangdong, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Quick locking piece and display screen assembly
    • Patent number 10,995,787
    • Issue date May 4, 2021
    • ROE VISUAL CO., LTD.
    • Danhu Cai
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Leveling device and easy-to-level display screen
    • Patent number 10,857,656
    • Issue date Dec 8, 2020
    • ROE VISUAL CO., LTD.
    • Danhu Cai
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Guiding device and self-unloading anti-separation display device
    • Patent number 10,775,656
    • Issue date Sep 15, 2020
    • ROE VISUAL CO., LTD.
    • Danhu Cai
    • G02 - OPTICS
  • Information Patent Grant

    Modular display support frame
    • Patent number D865222
    • Issue date Oct 29, 2019
    • ROE VISUAL CO., LTD.
    • Danhu Cai
    • D25 - Building units and construction elements
  • Information Patent Grant

    Modular video support frame member
    • Patent number D849726
    • Issue date May 28, 2019
    • ROE VISUAL CO., LTD.
    • Danhu Cai
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Hand cart
    • Patent number D828971
    • Issue date Sep 18, 2018
    • ROE VISUAL CO., LTD.
    • Danhu Cai
    • D34 - Material or article handling equipment
  • Information Patent Grant

    Connector
    • Patent number D822667
    • Issue date Jul 10, 2018
    • ROE VISUAL CO., LTD.
    • Danhu Cai
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Connector
    • Patent number D822668
    • Issue date Jul 10, 2018
    • ROE VISUAL CO., LTD.
    • Danhu Cai
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Connector
    • Patent number D822666
    • Issue date Jul 10, 2018
    • ROE VISUAL CO., LTD.
    • Danhu Cai
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    LED display
    • Patent number D821497
    • Issue date Jun 26, 2018
    • ROE VISUAL CO., LTD.
    • Danhu Cai
    • D20 - Sales and advertising equipment
  • Information Patent Grant

    Magnetic chuck
    • Patent number D817285
    • Issue date May 8, 2018
    • ROE VISUAL CO., LTD.
    • Danhu Cai
    • D13 - Equipment for production, distribution, or transformation of energy
  • Information Patent Grant

    LED display screen with a quick installation structure
    • Patent number D804712
    • Issue date Dec 5, 2017
    • ROE VISUAL Co., Ltd.
    • Danhu Cai
    • D26 - Lighting

Patents Applicationslast 30 patents