Patents by Inventor Quanlin Liu

Quanlin Liu 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).

  • Smoke detector
    Patent number: D884536
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: May 19, 2020
    Inventor: Quanlin Liu
  • Smoke detector
    Patent number: D885224
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: May 26, 2020
    Inventor: Quanlin Liu
  • Smoke detector
    Patent number: D885225
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: May 26, 2020
    Inventor: Quanlin Liu