Patents by Inventor Liangqiong Duan

Liangqiong Duan 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).

  • Plug socket
    Patent number: D976834
    Type: Grant
    Filed: October 26, 2022
    Date of Patent: January 31, 2023
    Inventor: Liangqiong Duan
  • Adaptor
    Patent number: D1020648
    Type: Grant
    Filed: May 8, 2023
    Date of Patent: April 2, 2024
    Assignee: CHANGSHA YINUOQING ELECTRONIC TRADING CO., LTD
    Inventor: Liangqiong Duan
  • Adaptor
    Patent number: D1023969
    Type: Grant
    Filed: January 19, 2024
    Date of Patent: April 23, 2024
    Assignee: CHANGSHA YINUOQING ELECTRONIC TRADING CO., LTD.
    Inventor: Liangqiong Duan