Patents by Inventor Ling Liang Ma

Ling Liang Ma 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).

  • Vacuum cleaner
    Patent number: D989425
    Type: Grant
    Filed: May 24, 2021
    Date of Patent: June 13, 2023
    Assignee: 22 THRASIO TWENY TWO, INC.
    Inventor: Ling Liang Ma