Patents by Inventor Yangfeng Zeng

Yangfeng Zeng 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).

  • Face mask
    Patent number: D928936
    Type: Grant
    Filed: September 16, 2020
    Date of Patent: August 24, 2021
    Assignee: YIWU YAOCHUN NETWORK TECHNOLOGY CO., LTD.
    Inventor: Yangfeng Zeng
  • Mask support frame
    Patent number: D934412
    Type: Grant
    Filed: September 22, 2020
    Date of Patent: October 26, 2021
    Assignee: YIWU YAOCHUN NETWORK TECHNOLOGY CO., LTD.
    Inventor: Yangfeng Zeng