Patents by Inventor Zijia Ouyang

Zijia Ouyang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Engraving machine
    Patent number: D976295
    Type: Grant
    Filed: January 17, 2022
    Date of Patent: January 24, 2023
    Assignee: Shenzhen TwoTrees Technology Co., Ltd.
    Inventor: Zijia Ouyang